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Version history for VirtualBox

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Changes for v6.1.2 - v6.1.4

20.2.3.213

Changes for v6.0.14 - v6.1.0

Implemented support for importing a virtual machine from Oracle Cloud Infrastructure
Extended support for exporting a virtual machine to Oracle Cloud Infrastructure, allowing the creation of multiple virtual machines without re-uploading. Also added option to export a VM to the cloud using the more efficient variant "paravirtialized", and to specify free-form tags for cloud images
Virtualization core: Support for nested hardware-virtualization on Intel CPUs (starting with 5th generation Core i, codename Broadwell), so far tested only with guest running VirtualBox
Graphics: New style 3D support (with VBoxSVGA and VMSVGA) remains, old style 3D support (with VBoxVGA) has been completely removed
Shared Clipboard: Implemented experimental support for file transfers (Windows hosts/guests only at the moment). Needs to be enabled via VBoxManage (disabled by default). In addition, the following items were fixed and/or added:
Virtualization core: Drop recompiler, i.e. running VMs now needs a CPU supporting hardware virtualization
Runtime: Works now on hosts with many CPUs (limit now 1024)
Appliance and Cloud Import: Add field for defining firmware type (not part of OVF spec and thus manual in the Appliance case, for OCI it is automatically taken from the instance information)
GUI: Improved the VISO creation and file manager dialogs
GUI: Virtual machine list of VirtualBox Manager was improved. Machine groups are now more obvious visually and VM search functionality has been improved. Global Tools element can now be pinned in place, to avoid scrolling it with rest of machine list
GUI: Virtual machine details pane is now extended with embedded editors for selected VM attributes, allowing user to edit them on-the-fly byi clicking corresponding hyper-links without opening VM settings dialog
GUI: Details pane provides more complete information
GUI: Internal medium enumeration routines were optimized to reduce the load and optimize the performance in cases when user have lots of media registered. Also, we again allowed to add existing media (and create new) via Virtual Media Manager
GUI: More consistent medium selection (both showing known images and allowing to select using the file picker)
GUI: VM storage settings page was adjusted a bit in usability regard. User is now allowed to change controller bus type and can move attachments between the controllers by using drag and drop
GUI: Storage and Network settings pages bug-fixes and usability optimization
GUI: Added a new soft (virtual) keyboard enabling arbitrary keyboard input to guests, including multimedia keys
GUI: Fixed crash in cloud related wizards when accessibility functionality was enabled
GUI: Show VM CPU load as part of status bar CPU indicator
GUI: Improved and extended the Session Information dialog
GUI: Fixed/improved mouse pointer scaling
GUI: Some issues related to mouse integration cursor scaling were addressed (bug #14366), more to go
GUI: Fix and unify geometry save/restore in various dialogs
GUI: Added the missing restriction options for disabling new functionality such as the VISO creator
GUI: Popup messages mouse click fix
Graphics: Remove 3D support for VBoxVGA (old one deprecated with 6.0)
Graphics: Additional texture format support on Windows host
Graphics: Improved fix for flickering on Windows host
Input: Added support for horizontal scrolling in the PS/2 mouse device using the IntelliMouse Explorer protocol. Note that this support is automatically used by Linux guests but not by Windows guests
vboximg-mount: Experimental support for direct read-only access to NTFS, FAT and ext2/3/4 filesystems inside a disk image without the need for support on the host
vboximg-mount: Now also available on Linux host
Storage: Experimental support for virtio-scsi, for both hard disks and optical drives (including boot support in BIOS)
Storage: For optical drive emulation fix empty host drive crash
USB: Improvements for EHCI controller implementation
USB: Filter can now specify port path, uniquely identifying a port in a system
NAT: Fix TFTP OACK response, send only if request has options
NAT Network: Use non-blocking sockets on Linux for accepted incoming connections (port forwarding)
PCnet-ISA: Added new network adapter type, currently CLI only
Audio: Allow changing the host audio backend while the VM is in saved state
ACPI: Report NVMe controller
VGA: Improve hardware and BIOS compatibility
VBoxSVGA/VMSVGA: Support YUV2 and related texture formats with hosts using OpenGL (macOS and Linux), which accelerates video playback when 3D is enabled by delegating the color space conversion to the host GPU
VBoxSVGA/VMSVGA: Several drawing fixes for the 3D case
VMSVGA 3D: Fixed OpenGL compressed textures
VBoxManage: More cloud functionality coverage, e.g. starting a cloud instance
VBoxManage: As part of the guest control feature support moving multiple source files/directories to a target directory
Guest Control/VBoxManage: Added support for specifying multiple sources when renaming guest files
VBoxManage: Show "unrestricted guest" and "nested HW virtualization" CPU features when listing the host information
API: Reduce the amount of leftovers from Move VM function
Shared Clipboard: Implemented experimental support for file transfers for Linux hosts on Windows guests (disabled by default)
SMBIOS: Store system UUID in little endian format which is the default for new VMs, while existing VMs stick to the old VirtualBox behavior of storing them in big endian format for backwards compatibility to avoid breaking the activation status of Windows VMs
VBoxSDL frontend: Fixed running on Windows hosts
macOS host: Fix VM crashes (most visible on macOS Catalina)
Linux host: Improve vboxweb systemd service dependency information
Linux host: Drop PCI passthrough, the current code is too incomplete (cannot handle PCIe devices at all), i.e. not useful enough
Linux host and guest: Support Linux 5.4 (bug #18945)
Linux host and guest: Force disabling of kernel module signing during build (user can do it afterwards)
Windows host: When possible, distinguish USB devices by port number; helps with accurate capturing of devices when multiple otherwise identical devices are connected
Windows Guest Additions: Many fixes for drawing problems in the driver for VBoxSVGA
Windows Guest Additions: Fixes for legacy VBoxVGA adapter, restore previously working cases
Windows Guest Additions: Restore VHWA functionality for VBoxSVGA
Windows guest: DXVA implementation for WDDM driver
Documentation: Updated supported host operating systems, added few new manual pages (more to come later)
EFI: Switch to newer firmware code base and add NVRAM support, should improve compatibility with OSes significantly
EFI: Added support for booting from APFS
EFI: Added support for non-standard SATA and NVMe boot device paths created by OS X
EFI: Modified updated EFI code base to support older OS X guests again

Changes for v6.0.10 - v6.0.14

This is a maintenance release. The following items were fixed and/or added:
Virtualization core: fixed an invalid-guest state guru meditation in some rare circumstances on Intel hosts
Virtualization core: some fixes for systems with lots of processors
Audio: relaxed VRM / VRA (variable rate audio) bit checks to provide more compatibility for guests running ALSA setups with the AC'97 emulation
USB: made device capturing for passthrough more accurate and reliable on Windows host
Network: fixed potential issue with interrupt signalling for network adapters in UEFI guests
3D: fixed flicker and redraw issues when using VBoxSVGA or VMSVGA graphics adapter (bugs #18562, #18956)
3D: fixed crash with some applications when using VBoxSVGA or VMSVGA graphics adapter (bug #18638)
macOS host: fix crash of GUI VM process which showed up frequently with 10.15 Catalina (bug #18990)
Linux host: support Linux 5.3, thank you Larry Finger (see also bug #18911)
Linux host: improve python version detection during rpm package creation, can change package dependencies and fix some installation problems
Linux guests: calls to aio_read(3) and aio_write(3) may fail inside shared folders (bug #18805)
Linux guests: fix problem with shared folder unmounting in service script, thank you Denis Ryndine (bug #18853)
Linux guests: VBox 6.0.10 GAs fail to compile on Red Hat/CentOS/Oracle Linux 7.7 and Red Hat 8.1 Beta (bug #18917)
VirtualBox 6.0.12 (released September 03 2019)
This is a maintenance release. The following items were fixed and/or added:
OCI export: handle empty disk image correctly
API: fix potential crash when using the medium I/O functionality
VBoxManage: fixed documentation of VBoxManage modifyvm uarttype (bug #18759)
Network: scrub inbound TCP URG pointer, working around incorrect OOB handling
USB: Improved identification of power-saved devices on Windows hosts
Audio: in the AC97 work around buggy guest drivers which reprogram the sampling rate, breaking audio in and/or audio out
Windows host: fixed crashes on startup with software trying to inject code into a VM process
Linux host and guest: fix kernel module build for SLES 12 SP4 kernel
3D: fixed state saving and loading when the VBoxVGA graphics adapter is used with 3D enabled (bug #18802, 6.0.10 regression)
Windows guests: fixed mouse cursor visibility updating
Windows guests: fixed graphics corruption in Windows 10 search menu with VBoxSVGA adapter
Windows guests: fixed dwm.exe crashes related to the WDDM driver for VBoxSVGA adapter when the VM has lots of RAM
MacOS Guest Additions fail to start in 6.0.10 (bug #18793)
Windows guests: fixed crashes when using shared folders (bug #18766)
Linux guests: unprivileged users unable to create files inside shared folders (bug #18737)
Linux guests: improve compatibility of vboxvideo.ko kernel module build logic (bug #18869)

Changes for v6.0.4 - v6.0.10

This is a maintenance release. The following items were fixed and/or added:
User interface: fix issue inputing controller names (bug #11579)
User interface: fix resize problems with recent Linux hosts (bug #18677)
Serial: fixed guru meditation when raw mode is enabled (bug #18632)
Serial: fixed possible VM crash under certain circumstances
USB: Fixed "unrecoverable error" problems in OHCI emulation (bug #18593, 6.0.6 regression)
USB: improve captured device identification
VBoxManage: fix reversed reporting of audio input and output (thank you Socratis Kalogrianitis)
VBoxManage: fix controlling recording for running machine (bug #18723)
Guest control service: various fixes
Windows hosts: fix problems copying files from shared folders (bug #18569)
Linux hosts: kernel module build fixes for various kernels (bug #18316)
Linux hosts: support UEFI secure boot driver signing on Ubuntu and Debian hosts (bug #11577)
Linux hosts: fix focus grabbing problems with recent Qt versions (builds from source only; thank you Fabian Vogt (SUSE) and Larry Finger; bug #18745)
Windows guests: many shared folders fixes
Windows guests: fix other services failing if seamless mode was not available
Linux guests: kernel module build fixes for various kernels (bugs #18677 and #18697; fixes by Larry Finger and Gianfranco Costamagna)
Linux guests: do not try to load old versions of libcrypt on recent guests in Guest Additions tools (bug #18682)
Linux guests: udev rules for guest kernel modules did not always take effect in time
Linux guests/VMSVGA: do not forget the guest screen size after a guest reboot
OS/2 guests: various shared folder fixes
VirtualBox 6.0.8 (released May 13 2019)
This is a maintenance release. The following items were fixed and/or added:
Core: fix saved state resume failures (bugs #18265 and #18331)
User interface: show full file location in New Medium window.
User interface: fix mouse click pass-through problems in multi-screen virtual machines (6.0.6 regression, bug #18567)
Graphics: fixed a crash when powering off a VM without graphics controller (bug #18570)
API: partial fix for dealing with VM config conflicting with other VMs related to medium UUIDs, now correctly flags VM as inaccessible (bug #17908)
Windows hosts: Support paths longer than 4096 characters on in shared folders
Linux hosts: fix kernel module build breakage in non-default build set-ups (bug #18620, thank you Ambroz Bizjak)
Linux hosts: fix kernel module build breakage in debug build set-ups (bug #18621, thank you Ambroz Bizjak)
Windows guests: notice file size increases in shared folders which were missed in certain cases
Linux guests: make shared folders work with Linux 3.16.35
Linux guests: fix incorrectly read-only shared folders (bug #18345)
VirtualBox 6.0.6 (released April 17 2019)
This is a maintenance release. The following items were fixed and/or added:
Virtualization core: nested AMD virtualization fixes
User interface: fixed copying directories in file manager
User interface: fixed operation progress in file manager when copying content
User interface: fixed operation progress when deleting snapshots
User interface: fixed unattended installation of recent Ubuntu guests
User interface: new virtual disk sector sizes should be divisible by 512 (bug #18177)
User interface: various additional improvements
Storage: fixed loading saved states for LsiLogic devices (6.0.0 regression; bug #18263)
Storage: fixed fixed reading certain QCOW2 images and support version 3 of the format readonly
Storage: Improved IDE PCI emulation to allow NetWare IDE drivers to use bus-mastering
Graphics: Improved VMSVGA support to work with old X servers which previously showed only a badly scrambled screen
Graphics: fixed invisible mouse cursor with VMSVGA emulation and without mouse integration (bug #18239)
Graphics: make EFI work with VMSVGA emulation (bug #18282)
Graphics: remember last guest screen size VMSVGA emulation (bug #18408)
Graphics: fix RDP to guests using VMSVGA emulation (bug #18518)
Graphics: various additional VMSVGA emulation fixes
Audio: implemented audio device enumeration for the DirectSound backend
Network: fixed unwanted padding bytes in Windows host adaptor network packets (bug #18202 and bug #18355)
Serial: fixed possible crash on Windows when using a host device (6.0.0 regression; bug #18319)
Serial: fixed loopback handling in the emulation causing garbage to be sent during boot with Linux guests (6.0.0 regression; bug #18319)
Shared folders: fixed duplicate folders after restoring a saved state (bug #18373)
Shared folders: fixed hangs inside guest (bug #18151)
Drag and drop: fixed copying files from guest host (bug #18305)
Recording: fixed modifying settings via VBoxManage (bug #18494)
Fixed invalid Extra Data characters making machines inaccessible
VBoxManage: crash fix (bug #18341)
Fixed hangs during failed virtual machine start-up
Windows host: fix unwanted wake-ups from standby, thank you Daniel Karsubka (bug #18549)
Windows host: disallow Pause as a host key (bug #18482)
Linux host and guest: support Linux 5.0 and 5.1, thank you Valdis Kletnieks (see also bug #18515)
Linux host: support kernel 4.4.169 (bug #18315)
Linux host: fix logging when building Linux kernel modules (bug #18226)
Linux host: clarified building Linux host drivers with secure boot (bug #18312)
FreeBSD host: compilation fixes
Installers: reduced size of packages
Web services: work with Java 11
LibreSSL compilation fix, thank you Stefan Strogin
Windows guests: fixed running applications which use complex display topologies with WDDM driver, fixed Skype for Business hangs (bug #17092)
Windows guests: fixed an occasional guest crash with WDDM driver and VBoxSVGA adapter (bug #18369)
Windows guests: shared folder file creation detection issue (bug #9276)
Windows guests: fixed "mismatched pool allocation/free" error with checked builds of Windows and ReactOS (bug #18187, thank you Adam Stachowicz)
Linux guests: shared folder performance and reliability improvements and missing features (bugs #17360, #819)
Linux guests: fixed a NULL pointer dereference in vboxvideo (bug #18443)
Solaris guests: fix an error message from VBoxClient (bug #18428)

Changes for v5.2.18 - v6.0.4

This is a maintenance release. The following items were fixed and/or added:
Virtualization core: support Shanghai/Zhaoxin CPUs.
User interface: handle command line arguments to VirtualBox correctly (bugs #18206 and #18197)
User interface: improvements to machine manager window, virtual optical disk creator, storage selector window and log viewer window
User interface: various small fixes and improvements
Audio: implemented time scheduling for the AC'97 device emulation to keep audio and video in sync
Graphics: basic support for VMSVGA graphics device in virtual machines using EFI
Network: fix occasional NATNet crashes (bug #13899)
Network: worked around problems in certain PCnet drivers on old operating systems
Serial: fixed connecting to pseudo terminals on POSIX hosts (6.0.0 regression; bug #18319)
Linux hosts and guests: fix for building kernel modules against Linux 5.0. Thank you Kyle Laker
VirtualBox 6.0.2 (released January 15 2019)
This is a maintenance release. The following items were fixed and/or added:
User interface: fixed creation of desktop shortcuts for starting virtual machines (bug #18207)
User interface: allow the first run window to selecting host drives (bug #18230)
User interface: fixed attaching empty host optical drives (bug #18223)
User interface: implemented a new virtual optical disk creation window
USB: modified Linux backends to reset USB devices (previously, most guest attempts to reset USB devices were ignored)
PCnet: fixed a regression which caused some PCnet PCI guest drivers to not detect the emulated hardware (bug #18286)
Linux hosts: Skip device enumeration if PulseAudio interface is not available
Linux hosts: fixed conflict between Debian and Oracle build desktop files (bug #18264)
Linux and MacOS hosts: VirtualBoxVM command not accessible (bug #18257)
Windows guests: multiple monitor fixes with VBoxSVGA graphics
Windows guests: black screen with VBoxSVGA graphics when 3D is disabled (bug #18205)
Linux guests: fixed building drivers on SLES 12.4 (bug #18213)
Linux guests: fixed building shared folder driver with older kernels (bug #18238)
OS/2 shared folders: fixed write regression introduced in 6.0.0 GA
VirtualBox 6.0.0 (released December 18 2018)
This is a major update. The following major new features were added:
Implemented support for exporting a virtual machine to Oracle Cloud Infrastructure
User interface: greatly improved HiDPI and scaling support, including better detection and per-machine configuration
Major rework of user interface with simpler and more powerful application and virtual machine set-up
User interface: a new file manager enabling user to control the guest file system and copy files between host and guest.
Graphics: major update of 3D graphics support for Windows guests, and VMSVGA 3D graphics device emulation on Linux and Solaris guests
Added support for surround speaker setups (as used by Windows 10 Build 1809)
Added utility vboximg-mount on Apple hosts to access the content of guest disks on the host
Added support for using Hyper-V as the fallback execution core on Windows host, to avoid inability to run VMs at the price of reduced performance In addition, the following items were fixed and/or added:
Execution core: fixed single-stepping in certain circumstances (bug #17316)
User interface: video and audio recording can now be separately enabled
Audio/Video recording fixes and improvements
Audio: better support for attaching and detaching remote desktop connections
Serial port emulation fixes
Serial ports: allow changing the serial port attachment while a machine is running (bug #6115)
Networking: Added a workaround for older guests which do not enable bus mastering for the virtio PCI device
Networking: fixed wrong RCODE from DNS AAAA query with --natdnshostresolver1 (bug #18171)
iSCSI: In cases where there is no ambiguity, the LUN of an iSCSI target is automatically determined, for targets with non-zero LUNs
Transparently resize disk images when merging if possible
VBoxManage: support for DHCP options
Fixed VNC/RDP (bug #18153)
Guest Control: various new interfaces and features (see SDK documentation)
Linux hosts: support Linux 4.20 (thank you Larry Finger)
Solaris: installer fixes
Shared folders: performance improvements
Guest Additions: improved shared folder auto-mounting
Windows Guest Additions: fix incorrect tablet co-ordinate handling with recent Windows 10 builds
Linux Additions: fix for building vboxvideo on EL 7.6 standard kernel, contributed by Robert Conde (bug #18093)
Linux guests: support Linux 4.20 (thank you Larry Finger)
Linux guests: support VMSVGA in the Linux and X11 Additions
MacOS Guest Additions: initial support
OS/2 Guest Additions: initial shared folder support
BIOS fixes
ACPI: Up to four custom ACPI tables can now be configured for a VM

Changes for v5.2.16 - v5.2.18

This is a maintenance release. The following items were fixed and/or added:
VMM: See user manual.
VMM: fix loading with recent binutils and self-built versions of VirtualBox (bug #17851)
NAT: fix --nataliasmode sameports which is a valid setting (bug #13000)
VRDP: fixed VM process termination on RDP client disconnect if 3D is enabled for the virtual machine

Changes for v5.2.10 - v5.2.12

This is a maintenance release. The following items were fixed and/or added:
Serial: fixed possible data corruption when sending data under certain circumstances
Video recording: fixed starting / stopping recording under certain circumstances
Linux hosts: support Linux 4.17 changes. Thank you Larry Finger
Linux guests: support Linux 4.16 and EL 7.5 kernels (bugs #17676 and #17678)
Linux guests: 3D fixes for recent guests (bug #17623)

Changes for v5.2.8 - v5.2.10

VMM: Fixed missing NULL pointer check in MMIO code
Storage: fixed having multiple NVMe controllers with ICH9 enabled (5.2.0 regression)
Network: fixed wireless detection regression when bridging to adapters with unbound IP protocols (bug #17543)
Network: fixed VERR_INTNET_FLT_IF_NOT_FOUND when bridging to some adapters on Windows hosts (possibly related bugs #15294, #15060, #13481)
Audio: Fixed interrupt storm in FreeBSD guests with HDA (bug #17219)
Keyboard: Introduced a small delay to fix old software which expects to be able to read an incoming scan code more than once (bug #17592)
Windows installer: Removed the "Ignore" action in the case the current VBox installation is still running, as the (successful) update will not work until a host reboot is performed
NAT: Handle nameserver 0.0.0.0 which is a valid setting (bug #17584)
BIOS: INT 15h/87h service must disable A20 gate when done
Linux Guest Additions: fix a hang starting KDE Plasma

Changes for v5.2.6 - v5.2.8

This is a maintenance release. The following items were fixed and/or added:
VMM: added support for FSGSBASE, PCID, INVPCID CPU features for guests
VMM: fixed EMM386 issue with detecting suitable page frame base (bug #10022)
Front end: Linux: prevent VM window from jumping and auto-resizing to tiny size after resizing it on HiDPI screen
Front end: Linux: fixed seamless regression caused by wm_class functionality (bugs #12534, #17304)
Front end: switched to https downloads
Front end: fixed crash while opening New machine wizard (s.a. forums topic 86592)
Audio: added support for distinguishing recording sources in the PulseAudio mixer on the host when multiple VMs are running
Audio: various fixes for the DirectSound backend
Video recording: added better file seeking support and fixed playback of recorded files with certain players (e.g. Firefox)
Audio: various fixes for Windows guest surround setups
Audio: various fixes for HDA emulation
Serial: fixed an issue where the serial port parameters in the emulation and host serial port got out of sync (bug #17116)
Storage: fixed overwriting certain INQUIRY data for the DVD/CD drive attached to a AHCI controller
Storage: fixed handling VMDK images created by Amazon EC2 VM export
Network: fixed PXE boot regression in e1000
Network: Added a workaround for older guests which do not enable bus mastering for the virtio PCI device
3D: add environment variable to configure presenting 3D content on main thread (see bug #13653)
Windows hosts: fixed indiscriminate binding of NDIS5 bridged driver, that caused PPPOE malfunction (bugs #16407, #17489)
Windows guests: fixed incorrect function error when using shared folders in certain applications (bug #14118)
Linux guests: Linux 4.15 support (bugs #17311, #17320, #17282)
Linux guests: fixed black screen when 3D enabled in guests (bug #17463, 5.2.6 regression)
Linux guests: suppress setuid and setgid in shared folders

Changes for v5.2.4 - v5.2.6

GUI: fixed occasional screen corruption when host screen resolutio n is changed
User interface: increase proposed disk size when creating new VMs for Windows 7 and newer
User interface: various improvements for high resolution screens
VMM: Fixed problems using 256MB VRAM in raw-mode VMs
Audio: implemented support for audio playback and recording for macOS guests
Audio: further timing improvements for Windows 10 guests
Linux hosts: fixed problem accessing mini-toolbar under XFCE

Changes for v5.1.28 - v5.2.4

This is a maintenance release. The following items were fixed and/or added:
User interface: Adjusting desktop file for X11 window managers (bug #17312)
User interface: various high resolution display adjustments
Audio: fixed SB16 volume handling (5.2 regression)
Audio: various fixes
USB/OHCI: fixed a problem where OHCI emulation might sporadically drop data transfers
Linux hosts: fixed screen corruption when the host screen changes and a virtual machine window is maximized
X11 Guest Additions: fixed a hang at the GNOME Shell login screen with 3D enabled (5.2 regression, bugs #17189 and #17190)

Changes for v5.1.26 - v5.1.28

This is a maintenance release. The following items were fixed and/or added:
GUI: mouse events did not reach host windows behind the transparent VM window (Mac OS X hosts only; bug #16246)
Audio: fixed accidental crashes when using the AC'97 sound emulation (bug #16959)
Audio: fixed crash when default input or output devices have changed (bugs #16968, #16969, #17004)
Audio: fixed recording when using the ALSA backend
Audio: fixed handle leak when using the OSS backend
E1000: fixed a crash related to VLAN traffic over internal network (5.1.26 regression; bug #16960)
NAT: apply --natbindip1 to TCP connections (bug #16478)
OVF: when importing an appliance with XHCI controller, don't add an OHCI controller.
Mac OS X hosts: fixed a GUI crash if Spotlight is used from file dialogs (5.1.20 regression; bugs #16935, #16953)
Linux hosts: fixed creating fixed sized VDI images (bug #17010)
Linux hosts / guests: fixes for Linux 4.4 of openSUSE Leap 42.3 (bug #16966)
Bridged networking: align outgoing packet at word boundary, preventing Windows host crash in MsLbfoProvider.
Linux Additions: kernel drm driver support for custom EL7 Linux 3.10 kernel
Solaris Additions: hide an informational message on the bootup console

Changes for v5.1.24 - v5.1.26

This is a maintenance release. The following items were fixed and/or added:
VMM: reset the TSC on VM reset to work around a Windows bug (bug #16643)
Audio: fixed memory leak when enabled with VRDP connections (5.1.24 regression; bug #16928)
Audio: fixed creation of too many sound sinks on Linux hosts when using the PulseAudio backend (bug #16938)
Audio: implemented record gain registers for AC'97 emulation; those are needed for newer Ubuntu guests which rely on those when controlling gain and muting the recording (capturing) levels
Storage: fixed hang when using the emulated NVMe controller with the SPDK (bug #16945)
Mouse: double click was not working with a precision touchpad (bug #14632)
Linux hosts: properly bring up host-only network interfaces with iproute (5.1.24 regression; bug #16911)
Linux hosts: provide Python 3 libraries for deb/rpm packages
Windows hosts: make it possible to use host-only networking without having bridged networking installed
Windows guests: fixed automatic logons for Vista and newer Windows guests (5.1.24 regression; bug #16921)

Changes for v5.1.20 - v5.1.22

This is a maintenance release. The following items were fixed and/or added:
VMM: fixed VERR_IEM_INSTR_NOT_IMPLEMENTED Guru Meditation under certain conditions (5.1 regression; mostly Mac OS X hosts; bugs #15693, #15801, #16274, #16569, #16663)
VMM: fixed software virtualization on Solaris hosts (5.1.20 regression)
Storage: fixed a potential hang under rare circumstances (bug #16677)
Storage: fixed a potential crash under rare circumstances (asynchronous I/O disabled or during maintenance file operations like merging snapshots)
Linux hosts: make the ALSA backend work again as well as loading the GL libraries on certain hosts (5.1.20 regression; bugs #16667, #16693)
Linux Additions: fixed mount.vboxsf symlink problem (5.1.20 regression; bug #16670)

Changes for v5.1.18 - v5.1.20

This is a maintenance release. The following items were fixed and/or added:
Shared Folders: fixed case insensitive filename access (5.1.16 regression; Windows guests only; bug #16549)
Shared Folders: fixed access to long pathes (5.1.16 regression; Windows guests only; bugs #14651, #16564)
API: fixed snapshot handling of medium attachments and PCI device attachments (bug #16545)
API: make 32-bit Windows guests in raw mode boot again if the ICH9 chipset is used (5.1.16 regression)
VBoxBugReport: fixed VM log collection issue
Linux hosts: fixed autostart service script (bug #14955)
Windows Additions: fixed automatic logins for Windows Vista and newer (5.1.4 regression; bug #15904)

Changes for v5.1.16 - v5.1.18

This is a maintenance release. The following items were fixed and/or added:
Shared Folders: fixed case insensitive filename access (5.1.16 regression; Windows guests only; bug #16549)
Shared Folders: fixed access to long pathes (5.1.16 regression; Windows guests only; bugs #14651, #16564)
API: fixed snapshot handling of medium attachments and PCI device attachments (bug #16545)
API: make 32-bit Windows guests in raw mode boot again if the ICH9 chipset is used (5.1.16 regression)
VBoxBugReport: fixed VM log collection issue
Linux hosts: fixed autostart service script (bug #14955)
Windows Additions: fixed automatic logins for Windows Vista and newer

Changes for v5.1.14 - v5.1.16

This is a maintenance release. The following items were fixed and/or added:
VMM: don't access the MSR_IA32_SMM_MONITOR_CTL MSR if dual-monitor treatment is not available (KVM workaround, bug #14965)
VMM: another fix for handling certain MSRs on ancient CPUs without VT-x support for MSR bitmaps
VMM: fixed VERR_SSM_LOAD_CPUID_MISMATCH errors when restoring a saved state with SMP guests on hosts without the CPUID/HTT bit set (bug #16428)
VMM: fixed a bug in call gate emulation
VMM: FWAIT instruction fix
VMM: fixed a sporadic guest hang under certain conditions
GUI: hide the mini-toolbar from the taskbar and the pager on certain X11 hosts
GUI: better error handling on the global settings / network / host-only / DHCP server settings
GUI: fixes for full-screen with multiple screens
Host-only Network: fixed host-only adapter creation issue preventing VirtualBox installation on Windows 10 hosts (bug #16379)
NAT network: fixed two potential crashes in the DHCP server
ICH9: fixed incorrect initialization of the primary bus for PCI bridges (5.1.14 regression)
Storage: LsiLogic fix for Windows 10
USB: fixed not being able to attach certain USB devices having invalid characters in the device strings (5.0.18 regression; bug #15956)
USB: several fixes for the USB/IP support (bug #16462)
VBoxSVC: fixed another crash during shutdown under rare circumstances
VBoxSVC: fixed a stack overflow on (Windows debug builds only; bug #16409)
OVF: when importing an appliance handle more than 10 network adapters if the OVA was created by VirtualBox (bug #16401)
OVF: fixes for exporting and importing appliances with many disks (bug #16402)
VBoxManage: fixed regression with modifyhd --resize (bug #16311)
rdesktop-vrdp: source code tarball fixes
Linux Installers: do not rebuild kernel modules unnecessarily (bug #16408)
Linux hosts: added an action for opening the VM manager window to the .desktop file
Linux hosts / guests: Linux 4.11 compile fixes (bug #16506)
Linux Additions: added vboxsf FS modules alias (bug #16404)
Linux Additions: fix for the shared folders kernel module to compile on Linux 4.10
Linux Additions: properly install the Linux kernel module override rule on distributions without /etc/depmod.d
Windows Additions: fixed a crash with recent Windows 10 builds if 3D is disabled

Changes for v5.1.12 - v5.1.14

VMM: fixed emulation of certain instructions for 64-bit guests on 32-bit hosts
VMM: properly handle certain MSRs for 64-bit guests on ancient CPUs without VT-x support for MSR bitmaps (bug #13886)
GUI: fixed a crash with multimonitor setups under certain conditions
GUI: allow cloning of snapshots when the VM is running
NVMe: fixed compatibility with the Storage Performance Development Kit (SPDK, bug #16368)
VBoxSVC: fixed a crash under rare circumstances
VBoxManage: added a sanity check to modifymedium --resize to prevent users from resizing their hard disk from 1GB to 1PB (bug #16311)
Windows hosts: another fix for recent Windows 10 hosts
Linux hosts: Linux 4.10 fixes
Linux Additions: fixed protocol error during certain operations on shared folders

Changes for v5.0.22 - v5.0.24

VMM: reverted to the old I/O-APIC code for now to fix certain regressions with 5.0.22 (bug #15529). This means that the networking performance with certain guests will drop to the 5.0.20 level (bug #15295). One workaround is to disable GRO for Linux guests.
Main: when taking a screenshot, don't save garbage for blanked screens
NAT: correctly parse resolv.conf file with multiple separators (5.0.22 regression)
Storage: fixed a possible corruption of stream optimized VMDK images from VMware when opened in read/write mode for the first time
Audio: imlemented dynamic re-attaching of input/output devices on Mac OS X hosts
ACPI: notify the guest when the battery / AC state changes instead of relying on guest polling
Linux hosts: fixed VERR_VMM_SET_JMP_ABORTED_RESUME Guru Meditations on hosts with Linux 4.6 or later (bug #15439)
Solaris hosts: make the GUI work on Solaris 10 again (bug #15549)

Changes for v5.0.20 - v5.0.22

This is a maintenance release. The following items were fixed and/or added:
VMM: fixes for certain Intel Atom hosts (bug #14915)
VMM: properly restore the complete FPU state for 32-bit guests on 64-bit hosts on Intel Sandy Bridge and Ivy Bridge CPUs
VMM: new I/O-APIC implementation fixing several bugs and improving the performance under certain conditions (bug #15295 and others)
VMM: fixed a potential Linux guest panic on AMD hosts
VMM: fixed a potential hang with 32-bit EFI guests on Intel CPUs (VT-x without unrestricted guest execution)
GUI: don't allow to start subsequent separate VM instances
GUI: raised upper limit for video capture screen resolution (bug #15432)
GUI: warn if the VM has less than 128MB VRAM configured and 3D enabled
Main: when monitoring DNS configuration changes on Windows hosts avoid false positives from competing DHCP renewals. This should fix NAT link flaps when host has multiple DHCP configured interfaces, in particular when the host uses OpnVPN.
Main: properly display an error message if the VRDE server cannot be enabled at runtime, for example because another service is using the same port
NAT: Initialize guest address guess for wildcard port-forwarding rules with default guest address (bug #15412)
VGA: fix for a problem which made certain legacy guests crash under certain conditions (bug #14811)
ACPI: properly notify the guest if the ACPI battery state changed
OVF: fixed import problems for some appliances using an AHCI controller created by 3rd party applications
SDK: reduced memory usage in the webservice Java bindings
Windows hosts: fixed performance regresson with SMP guests (5.0 regression)
Windows hosts: fixes for the shared clipboard
Windows hosts: Windows hardening fix
Windows Additions: fixes to retain the guest display layout when resizing or disabling the guest monitors
Linux hosts: EL 6.8 fix (bug #15411)
Linux hosts: Linux 4.7 fix (bug #15459)
Linux Additions: Linux 4.7 fixes (bug #15444)
Linux Additions: fix for certain 32-bit guests (5.0.18 regression; bug #15320)
Linux Additions: fixed mouse pointer offset (5.0.18 regression; bug #15324)
Linux Additions: made old X.Org releases work again with kernels 3.11 and later (5.0.18 regression; bug #15319)
Linux Additions: fixed X.Org crash after hard guest reset (5.0.18 regression; bug #15354)
Linux Additions: don't stop the X11 setup if loading the shared folders module fails (5.0.18 regression)
Linux Additions: don't complain if the Drag and Drop service is not available on the host
Solaris Additions: added support for X.org 1.18

Changes for v5.0.14 - v5.0.16

VMM: fixed a problem which could lead to a wrong guest behavior on AMD CPUs (tickets #14831 and #15186)
GUI: don't try to synchronize the HID LEDs if the VM window is not active or if it's minimized (Windows / Mac OS X hosts only; bug #14302)
GUI: prevent a crash during startup under rare conditions
GUI: sub-menu option to disable the guest-OS type overlay in the application dock icon on Mac OS X
GUI: position off-screen windows to be fully visible again on relaunch
GUI: hide the VT-x/AMD-V checkbox if raw-mode is not supported (usually Mac OS X hosts; bug #15178)
PC speaker passthrough: new experimental feature, available on Linux host only
Audio: several fixes for Mac OS X hosts + guests
Audio: properly handle default audio device changes (Windows hosts)
USB: serveral fixes for the xHCI controller (e.g. for webcam passthrough)
BIOS: fixed int15/AH=83/AL=00 function (4.2.0 regression)
iPXE: enable the HTTP download protocol on non-Linux hosts (bug #13628)
Shared folders: fixed a failure to load the saved state under certain circumstances (bug #6314)
Guest Control: added support for (cached) Active Directory authentication in case the domain controller is not reachable (anymore)
Serial ports: raised the number of serial ports per VM from 2 to 4 (bug #9109)
Serial ports: fix for the TCP/IP backend (Windows hosts only; bug #15188)
SDK: make the Python webservice API binding work again (5.0 regression)
Seamless mode: fixed a crash under certain circumstances (bug #15106)
Linux hosts: fixed the /sbin/rcvboxdrv script as well as the missing shebang in two scripts (bugs #15055 and #15057)
Linux hosts: properly uninstall Python files installed by the .run installer
Windows hosts: hardening fix required for recent Windows insider builds (bug #14052)
Windows hosts: fixed Python installation path (bug #13131)
Windows hosts: support MTU larger than 2 KB with bridged networking (bug #15140)
Windows hosts / guests: properly sign binaries using a sha-256 certificate (bug #15054)
Windows Additions: fixed guest property enumeration of logged-in users
Windows Additions: fixed sporadical failure of the graphics driver in Windows 10 guests (bug #14409)
Windows Additions: under rare circumstances no mouse movement events were delivered to the guest

Changes for v5.0.10 - v5.0.12

This is a maintenance release. The following items were fixed and/or added:
GUI: fixed wrong scrolling behaviour in the VM selector window when a VM item is dragged out of the chooser-pane area
GUI: fixed the validation of IPv6 port-forwarding rules
GUI: suppress the first-run wizard if a CD/DVD medium is inserted using the selector UI
GUI: fixed the Ctrl+Break key sequence scan codes (bug #14927)
GUI: improved handling of text selection mouse pointer (bug #750)
Host services: fixed a crash during VM shutdown under rare conditions (5.0.6 regression; bug #14841)
Shared folders: fixed a sharing violation if a file is opened to check the attributes (Windows hosts only; bug #14450)
Webcam: passthrough fix for certain devices (Mac OS X hosts only)
XHCI: fixed broken emulation if software virtualization is used
XHCI: several fixes
3D: fixed state handling under certain conditions (bug #13487)
Audio: several fixes
BIOS: added LBA64 support for being able to boot from huge hard disks (bug #7415)
EFI: fix for Windows 10 guests
ExtPack: before installing an Extension Pack check if there are VMs running to prevent file system locking issues
rdesktop-vrdp: source code tarball fixes
Windows hosts: fixed hang when using VBoxAuthSimple library for VRDP external authentication (bug #14931)
Windows hosts: fixed a regression which prevented it to attach to a physical network adapter having TCP/IP disabled (bug #14578)
Windows hosts: fixed a regression which caused multi-port adapters to be shown as a single adapter (bugs #14558, #14622)
Windows hosts: fixed a regression which caused created host-only adapters to not appear in the list (bug #14437)
Windows hosts: fixed host-only adapter creation issues related to Windows 10 (bugs #14040, #14545)
Linux hosts: .desktop file compatibility issue (bug #14808)
Linux hosts / guests: fixes for RHEL 7.2 (bug #14866)
The command for recompiling the host kernel modules was changed again, to /sbin/rcvboxdrv setup (bug #14723)
Linux hosts: some fixes for PCI passthrough (still highly experimental)
Linux/Mac OS X hosts: fixed a VM hang during startup under certain circumstances (bug #14933)
Solaris hosts: added Python 2.7 bindings
Mac OS X hosts: fixed a possible crash when the default input or output audio device changes
Mac OS X hosts: fixed a panic under certain conditions
Linux Additions: prevent the compiler from doing dead-code elemination on vital code in guest / host communication (bug #14497)
Linux Additions: when mounting a shared folder, explicitly pass the share name so that /proc/mounts contains this name instead of 'none'
Linux Additions: workaround for a systemd problem in conjunction with SELinux which prevented to properly enable the 'vboxadd' service during while upgrading the Additions

Changes for v5.0.8 - v5.0.10

This is a maintenance release. The following items were fixed and/or added:
VMM: improved support for certain Intel Atom CPUs (bug #14773)
VMM: system register emulation fix (5.0 regression; bug #14515)
GUI: fixed immediate screenshot issue (bug #14108)
GUI: fixed another 3D overlay window reparenting issue when the VM is switched to fullscreen mode on X11 hosts
GUI: fixed help index (bug #14722)
GUI: fixed state synchronization issue in the VM manager window when VM was paused from its runtime window
Audio: fixed suspending/resuming audio streams on VM pause/unpause (bug #14784)
Audio: properly reset AC97 audio streams, otherwise there is silence until a non-48 kHz stream is played
Audio: fixed a small emulation quirk of the AD1980 codec of the HDA device to make recent linux guests work (bug #14653)
USB: serveral fixes for the xHCI controller
USB: fixed a crash under certain conditions on hosts with Linux kernels older than version 3.3
USB: better identification of certain USB devices
NAT: support TCP in DNS proxy (bug #14736)
NAT Network: fixed sporadic crashes on Windows hosts (bug #13899)
API: when creating differencing images (e.g. as part of a snapshot or cloning a VM) use the same disk image variant as the parent image if possible, which means that e.g. a diff image for a VMDK image split into 2 GB files will also be split (bug #14764)
API: event queue handling fixes preventing loss of certain events at runtime (e.g. new webcam attached), particularly important on Mac OS X hosts
Webcam: passthrough fix for certain devices (Windows hosts only)
VBoxManage: don't crash on snapshot restorecurrent / edit if the VM has no snapshots
VBoxManage: don't crash on controlvm addencpassword (bug #14729)
Mac OS X hosts: use the correct kernel on certain hosts
Windows hosts: fixed VRDP external authentication
Windows hosts: allow to use a shared folder path with extended-length path prefix (5.0 regression; bug #14651)
Windows hosts: fix a crash in the netfilter host driver under certain conditions (bug #14799)
Windows host installer: documented and fixed public properties which can be used to control the installation to some extent
Windows host installer: fixed not starting the actual installation when showing the version information or help dialogs
X11 Additions: added basic support for X.Org Server 1.18 (3D requires additional fixes)

Changes for v5.0.6 - v5.0.8

This is a maintenance release. The following items were fixed and/or added:
GUI: Mac OS X: Restore green zoom button for VM windows (it was hidden in the previous release to avoid native full-screen issues). For Yosemite and El Capitan this button should work accordingly to the Apple HIG: Full-screen by default, maximize if the user holds the Option key.
Serial ports: fixed wrong IRQ number for the first serial port in the ACPI tables (5.0.6 regression; bug #14659)
API: fixed a 5.0 regression in VBoxManage setproperty defaultfrontend (bug #14696)
VBoxManage/vbox-img: conversion to RAW images could result in a disk image containing all zeroes
Linux hosts: several fixes for systemd integration in .deb / .rpm packages (e.g. bug #14665). The command for recompiling the host kernel modules was changed to /sbin/vboxconfig
Linux hosts: make host-only interfaces report operstate UP only when they have VMs attached (bug #14526)
Mac OS X hosts: fix bpf capture and accounting of traffic on bridged and host-only interfaces (bug #14553)
Windows guests: fixed 3D rendering issues on high resolution displays
Windows Additions: fixed problems with 3D acceleration on Windows hosts with Intel HD graphics (bug #14670)
Linux Additions: fix service starting on Debian systems with systemd installed but not in use (bug #14683)

Changes for v5.0.4 - v5.0.6

This is a maintenance release. The following items were fixed and/or added:
GUI: the update check now uses the HTTP system proxy settings by default
GUI: About dialog improvements. Copyable version text, do not close dialog on mouse-clicks and focus losing, explicit close button at the bottom of dialog and disabled close button fix on OS X. (bugs #9912, #12749)
GUI: fixed bug when re-assigning shortcuts (bug #14565)
GUI: fixed default focus button in message-box dialogs (bug #14486)
GUI: fixed settings dialog which is opened if the network settings need to be changed at VM startup (5.0.0 regression; bug #14601)
GUI: fixed crash during VM start if an early error message needs to be shown, for example Linux kernel modules not present (bug #14646)
Bridged Networking: fixed handling of guest DHCP requests without UDP checksum when bridging to a wireless interface (bug #14615)
Audio: latency fixes (Windows hosts only; bug #4088)
Guest Control: correctly set USERNAME and USERPROFILE environment variables (Windows guests only)
Guest Control: several fixes
API: properly restore NAT port forwarding rules when reverting to a snapshot
Parallel ports: Several fixes allowing to enable two parallel ports for a VM
VBoxManage: fixed wrong output of debugvm show command
VBoxManage: fixed hang when specifying logging groups with debugvm log starting with h, for example hex
Windows hosts: renamed VBoxStartup.log to VBoxHardening.log and provide this log file in the GUI log viewer
Windows hosts: fixed a small memory leak in the Windows host interface driver (VBoxNetAdp) which caused a BSOD if the driver verifier is enabled (bug #14562)
Windows hosts: fixed a failure to start VMs on hosts where dsound.dll is not available (bug #14574)
Windows hosts: another fix for VERR_LDR_MISMATCH_NATIVE errors (bug #14579)
Windows hosts: fixed host-to-guest communication with bridged networking (bugs #14326, #14457)
Windows hosts: fixed broken data receiving from the serial device with the named pipe backend if Kaspersky AV is installed
Linux hosts: Linux 4.3 compile fixes
Linux hosts: installer fix for certain systems (bug #14627)
Linux hosts / guests: native systemd support for the host/guest installer scripts. The scripts for re-compiling the kernel modules are now located at /sbin/rcvboxdrv (host) and /sbin/rcvboxadd (Guest Additions)
Mac OS X hosts: GUI-related fixes for El Capitan
Mac OS X hosts: fixed a problem with capturing USB devices under El Capitan
Mac OS X hosts: allow colon character on shared folders (bug #14554)
Linux Additions: properly set the VBoxService process ID in the PID file (bug #14571)
Linux Additions: Guest Control fixes (bug #14573)
Windows Additions: fixed shutting down VBoxTray when running with older VirtualBox host versions
Windows Additions: fixed video playback with VLC and Windows Media Player when the WDDM driver is used and 3D is not used
Windows Additions: prevent a possible VLC crash when the WDDM driver is used and 3D is enabled by implementing YV12 surfaces

Changes for v5.0.0 Beta 3 - v5.0.0 Beta 4

VMM: some XSAVE fixes (e.g. here)
GUI: hot-plugging support for USB storage controller.
GUI: fixed icons for savestate/restorestate and some of icons for HiDPI aware Win/X11 hosts.
NAT: don't kill UDP bindings on ICMP errors (bug #13475)
Drag and drop: various bugfixes for Linux hosts and guests
Encryption: fixed cloning VMs
Audio: Fixed volume control for mono streams
Audio/SB16: Fixed loss of output after loading saved state.
USB3: fixed attaching multiple emulated disks to the xHCI controller
3D: fixed a crash on restoring the VM state (bug #12737)
Snapshots: fixed Beta 3 regression
VBoxManage: fixed reading the partition table on Windows
iSCSI: fixed a hang during power off if the initiator connects to the target over the internal network

Changes for v5.0.0 Beta 2 - v5.0.0 Beta 3

Changes for v4.3.26 - v4.3.28

This is a maintenance release. The following items were fixed and/or added:
VMM: fixed a Guru Meditation when rebooting certain guests (for example Solaris doing fast reboot) by fixing the implementation for INIT IPI
VMM: added some information for diagnosing rare VERR_VMX_INVALID_VMXON_PTR Guru Meditations (VT-x only)
GUI: HID LEDs sync: prevent synchronization if VM window has no focus (Windows and Mac OS X hosts only)
GUI: fixed drag and drop moving the cursor between guest screens on certain hosts
3D: fixed a crash on restoring the VM state on X11 hosts (bug #12737)
3D: fixed a crash on Linux guest shutdown (bug #12772)
VRDP: fixed incompatibility with rdesktop 1.8.3
VRDP: fixed listening for IPv6 on some systems (bug #14038)
Storage: don't crash if creating an asynchronous I/O context fails (e.g. when starting many VMs) and show a proper error message
Floppy: several fixes
Audio: improved the behavior of the volume control for the HD audio device emulation
USB: increase the number of supported drivers from 3 to 5 (Windows hosts only)
PS/2 keyboard: synchronize the LED state on VM restore (Windows and Mac OS X hosts only)
NAT Network: when running multiple NAT networks with multiple VMs, only stop the respective services when stopping VMs (bug #14090)
NAT: don't kill UDP bindings on ICMP errors (bug #13475)
NAT: bandwidth limit now works properly with NAT (bug #11485)
BIOS: fixed the returned size value of the VBE 2.0 PMI function 0Ah (4.2.0 regression; bug #14096)
Guest Control: fixed parameter quoting in Windows guests (bug #13157)
Webcam passthrough improvements for Linux (V4L2) hosts to support more webcam models
API: don't fail starting a VM with VBOX_E_INVALID_OBJECT_STATE under certain conditions (bug #13617)
API: be more verbose on VBOX_E_INVALID_OBJECT_STATE if a medium is attached to a running VM (bug #13560)
API: fixed a bug which could result in losing certain screen resize events with multi-monitor guests
rdesktop-vrdp: fixed path to the keymaps (bug #12066)
rdesktop-vrdp: switch to version 1.8.3
Windows hosts: more hardening fixes (e.g. bugs #14051, #14052)
Linux hosts: another fix for activated SMAP on Linux 3.19 and newer (Broadwell and later; bug #13961)
Linux hosts: Linux 4.1 compile fix (bug #14081)
Solaris hosts: fixed using of VNIC templates with Crossbow based bridged networking to be compatible with vanity interface names
Mac OS X hosts: fixed crash during VM termination under rare circumstances
Windows Additions/WDDM: improved video memory utilization and allow more/bigger guest screens with large resolutions (including HiDPI)
X11 Additions: prevent flickering when updating mouse cursor
Solaris Additions: fixed incorrect usage of 'prtconf' while installing Guest Additions (Solaris 10 only)

Changes for v4.3.24 - v4.3.26

This is a maintenance release. The following items were fixed and/or added:
GUI: in the snapshots pane, protect the age of snapshots against wrong host time (bug #13955)
NAT Network: fixed a bug which prevented to propagate any DNS name server / domain / search string information to the NAT network (4.3.24 regression; bugs #13915, #13918)
NAT Network: don't delay the shutdown of VBoxSVC on Windows hosts
Mouse support: the mouse could not be moved under rare conditions if no Guest Additions are installed (4.3.24 regression; bug #13935)
Storage: if the guest ejects a virtual CD/DVD medium, make the change permanent (bugs #9858, #12885)
VGA: made saving secondary screen sizes possible in X11 guests
SDK: fixed the VirtualBox.tlb file (4.3.20 regression; bug #13943)
rdesktop-vrdp: make it work with USB devices again (4.3.14 regression; bug #13901)
USB: fixed a possible BSOD on Windows hosts under rare conditions
iPXE: enable the HTTP download protocol on non-Linux hosts (bug #13628)
Mac OS X hosts: don't panic on hosts with activated SMAP (Broadwell and later; bug #13951)
Linux hosts: don't crash Linux 4.0 hosts (bug #13835)

Changes for v4.3.22 - v4.3.24

This is a maintenance release. The following items were fixed and/or added:
VMM: emulation fix for the ENTER instruction under certain conditions; fixes Solaris 10 guests (VT-x without unrestricted guest execution)
VMM: fix for handling NMIs on Linux hosts with X2APIC enabled
NAT/NAT Network: fix connection drops when the host's DHCP lease was renewed (4.3.22 regression; Windows hosts only; bug #13839)
NAT: don't crash on an empty domain list when switching the DNS host configuration (4.3.22 regression; Mac OS X hosts only; bug #13874)
PXE: re-enable it on Windows hosts (4.3.22 regression; Windows hosts only; bug #13842)
Shared Folders: fixed a problem with Windows guests (4.3.22 regression; bug #13786)
Audio: improved record quality when using the DirectSound audio backend
VBoxManage: when executing the controlvm command take care that the corresponding VM runtime changes are saved permanently (bug #13892)
Windows Installer: properly install the 32-bit version of VBoxRes.dll on 32-bit hosts (bug #13876)
Linux hosts / guests: Linux 4.0 fixes (bug #13835)
OS/2 Additions: fixed mouse integration (4.3.22 regression; bug #13825)
X11 Additions: fixed a sporadic failure to deactivate virtual screens (bug #13845)

Changes for v4.3.20 - v4.3.22

VMM: refined measurement of TSC frequency on the host, improves timekeeping for guests
VMM: decreased CPU load resulting from guest MMIO writes to the virtual APIC
VMM: fixed interception of debug exceptions, observed while using the dbx debugger on Solaris guests (VT-x only)
GUI: 3D overlay window positioning code improved, fixed potential misplacement of 3D accelerated guest graphics content
GUI: fixed accident SSL authentication failures during update check on Windows hosts (bug #12969)
GUI: never send the "ACPI power" keyboard scancode to the guest, we have the ACPI power button for that
GUI: was unable to properly restore seamless mode VM from snapshot/saved-state under some circumstances
VBoxHeadless: don't crash if 3D is enabled in the VM settings (bug #10250)
ATA: fixed several passthrough issues (bugs #12310, #1360)
Audio: fixed DirectSound failure when the the host has no audio input device (Windows hosts only; bug #9205)
SB16: fixed compatibility issue (bug #13769)
Storage: fixed broken CD/DVD passthrough when using the IDE controller (bug #12310)
NAT: new ping proxy for Windows hosts (bug #11871)
NAT: Properly report outbound connect(2) failures to guest with TCP RST or ICMP (bug #10525)
NAT Network: no need for frequent wakeups in VBoxNetDHCP and VBoxNetNAT (bug #11681)
Host-only adapter: prevent Windows from creating an "Unidentified network" (bug #9688)
Bridged Networking: don't leak host-to-guest traffic to the wireless network when bridging to a wireless interface (bug #13714)
Main: fixed a possible race when changing the medium leading to a deadlock under rare conditions (bug #13722)
VBoxManage: fixed return code if starting a VM failed (bug #13773)
API: fixed 2 deadlock opportunities related to medium handling (bugs #13789, #13801, thank you Alexander Urakov)
API: fixed bug in XPCOM which created too few worker threads, sporadically resulting in a deadlock (bug #13802, thank you Alexander Urakov)
SDK: fixed a garbage collection leak in the Python VirtualBox webservice API binding (bug #13817)
Linux hosts: fixes for activated SMAP (Broadwell and later, bug #13820)
X11 guests: prevent unwanted hiding of guest screens on multi-monitor guests (bug #13287)
X11 guests: added support for X.Org Server 1.17
X11 Additions: fixed a memory leak in VBoxService if libdbus is available but dbus-daemon isn't running (bug #13770)
Windows Additions: prevent VBox WDDM driver from loading if host reports weak OpenGL capabilities. 3D content now can be shown over Remote Desktop connection.
Winodws Additions: some fixes for recent Windows 10 Previews
Linux Additions: fixed a compatibility issue with 64-bit Linux 2.4 kernels
Linux Additions: fixed a potential use-after-free when unloading the VBoxGuest module
Linux Additions: Linux 3.19 fixes (bug #13741)

Changes for v4.3.18 - v4.3.20

VMM: fixed reboot hang of 32-bit Windows SMP guests (bug #13319, #13462)
VMM: proper Math Fault handling with certain legacy guests (bug #9042, AMD hosts)
VMM: fixed a Guru Meditation VINF_EM_TRIPLE_FAULT on older CPUs that don't support MSR-bitmaps (VT-x only; bugs #13034, #13125, #13311, #13425, #13426, #13463, #13585)
GUI: fix 3D overlay window re-parenting issue when VM goes to full screen mode on X11 hosts.
GUI: fix occasional loss of focus in full-screen mode on X11 host systems (4.3.16 regression)
GUI: Mac OS X: wizards should have Cancel button (bug #12541)
GUI: added a global option to prevent automatic raising of the new window by mouse move with multi-screen guests (bug #8878)
API: accept remote display port 0 as the default RDP port (bug #8534)
VBoxManage: fixed crash when executing showvminfo command under certain circumstances (bug #13190)
ACPI: fixed occasional Guru Meditations in ACPI timer code (4.3.18 regression; bug #13521)
EFI: improved performance of IDE disk access
EFI: fixed a bug in the EFI video driver which prevented Windows to boot in UEFI mode (bug #12022)
EFI: properly announce the amount of RAM for big VMs (bugs #11103 and #13211)
Storage: fixed a crash under certain circumstances when a medium was ejected from a drive attached to the SATA controller without inserting a new medium before pausing or closing the VM (4.3.16 regression)
Storage: fixed an interrupt acknowledge issue causing hanging guests or slower I/O (4.3.18 regression)
Storage: fixed broken resume after the VM was suspended due to a full disk if host I/O caching is used
Storage: fixed a Guru Meditation under certain conditions when using the DevLsiLogic controller with VMs running in raw mode (4.3 regression; bugs #12254, #12655, #12709, #12774, #12886)
Guest Control: fixed a bug which might lead to a crash during recursive copy
SDK: Java COM bindings fixes
iPXE: enable the HTTP download protocol (bug #13628)
Runtime: do not use a fixed stack size creating temporary threads during initialization (bug #13038)
Windows hosts: fixed more startup problems on certain Windows hosts due to conflicts with anti-virus software; better error reporting (4.3.14 regression; bug #13187)
Windows hosts: fixed DirectSound host audio failure under certain conditions (bug #13418)
Windows hosts: fixed additional cases of 4.3.14 regression whereby AltGr stopped working for some people (bug #13216)
Windows Additions: preserve guest monitor layout when resizing Windows 7 or newer guests
Linux Additions: Linux 3.18 compile fixes (bug #13515)

Changes for v4.3.16 - v4.3.18

VMM: fixed a potential misbehavior after restoring the A20 state from a saved state
GUI: fixed full-screen mode mini-toolbar related regressions for different platforms and window managers (bug #13369)
GUI: X11: fixed full-screen mode Unity panels quirk caused by mini-toolbar code changes in last release (bug #13365)
GUI: X11: added possibility to use legacy full-screen mode as the new one can cause multi-screen issues under Unity, see the manual for more information (bug #13365)
GUI: Mac OS X: fixed full-screen mode artifact causing black screen when 3D acceleration was enabled on 10.10 Yosemite hosts (bug #13448)
GUI: Mac OS X: fixed regression in user-space swiping from/to VBox in full-screen mode
GUI: Mac OS X: fixed issue with switching to VBox in full-screen mode through Alt+Tab and Mission Control
Storage: fixed data corruption when resizing huge VHD images under certain circumstances (bug #11960)
Storage: fixed a rare hang during startup when the BIOS enumerates the storage devices attached to the SATA controller
Storage: follow the spec with AHCI interrupt acknowledge (bug #13474)
Storage: fixed broken iSCSI authentication (4.3.14 regression, bugs #13386, #13435)
NAT Network: properly parse port forwarding rules to allow UDP rules
USB: fixed a crash on Linux hosts with older Linux kernels (bug #13400) and several other fixes
ACPI: fixed ACPI timer anomalies (bug #12076)
Guest Control: fixed a memory leak (bug #13434)
Main: when removing a VM, do also remove the VBoxStartup.log file which might exist on Windows hosts (bug #13478)
Windows hosts: fixed more startup problems on certain Windows hosts due to conflicts with anti-virus software; better error reporting (4.3.14 regression; bug #13187)
Windows hosts: propagate the process startup information to the child process (4.3.14 regression; bug #13243)
Mac OS X hosts: don't force using the discrete GPU (bug #11111)
Windows Additions: some Windows 10 tweaks
X11 guests: fix a bug handling video driver display properties which prevented GNOME Shell on Fedora 21 from starting
Linux hosts / guests: fixed a few remaining warnings in the kernel log if memory allocation fails (bug #11171)

Changes for v4.3.14 - v4.3.16

VMM: fixed restoring 32-bit FPU state on 64-bit capable VMs and restoring guest FPU in raw-mode VMs (bug #12646; 4.3 regression)
GUI: properly restore normal/scale mode guest-screen size after exiting full-screen/seamless mode
GUI: mini-toolbar should provoke less artifacts/conflicts with 3D guest rendering
GUI: Mac OS X: Native full-screen multi-screen transition was able to blackout host-screens for nearly minute
GUI: X11: Modern window managers should now use native full-screen multi-screen mapping API
GUI: added extradata item for configuring the mouse capture behavior, see the manual for more information (bug #3506)
Storage: fixed a VBoxSVC crash when querying an iSCSI target with authentication configured (4.3.14 regression)
Storage: fixed a rare data corruption during reads if another allocating write is running concurrently and accesses the same range
Storage: fixed a rare crash for certain VHD images from other products
Storage: fixed a rare release assertion when using the AHCI controller
Floppy: fixed read errors and guest memory corruption when running under control of QEMM
3D: added experimental support for rendering on offline GPUs for Mac OS X host
3D: fixed white window appearing on entering FullScreen mode on OSX host
3D: fixed video recording support for 3D data regression (bug #13073)
3D: fixes for MS Office 2013 support
3D: several fixes
Bridged Networking: improved IPv6 support when bridging to a wireless interface
NAT: prevent internal DNS service from stuck in host-resolver mode when host was switched from one network to another one while host was sleeping (Mac OS X hosts)
NAT: preserve DF (if possible) and TOS when proxying outbound UDP datagrams (bugs #9440, #12309)
NAT: don't let multicast datagrams out (bug #7338)
NAT: fixed handling of large incoming UDP datagrams on Windows hosts (bug #12136)
NAT: fixed handling of the RFC 1533 DHCP PAD option
NAT Network: fixed inbound half-close on Windows hosts
NAT Network: preserve IPv4 DF (if possible), TTL, TOS and IPv6 Hop Limit when proxying outbound UDP datagrams
VRDP: fixed a rare crash when using remote audio input
USB: fixed several regressions from 4.3.14 (bug #13320)
Audio: made the HDA sound emulation work with certain OSX guests (e.g. Mountain Lion)
Windows hosts: fixed startup problems on certain Windows hosts due to conflicts with anti-virus software (4.3.14 regression, bug #13187)
Windows hosts: fixed 4.3.14 regression whereby AltGr stopped working for some people (bug #13216)
X11 hosts: made the extra key on Brazilian Thinkpads work (bug #8745)
X11 hosts: fixed a problem of input focus cycles and immediately released key presses in full screen mode (bug #13238)
Linux hosts: fixed flooding the kernel log with USB related messages when passing through certain USB devices to a VM (bug #13085)
Linux guests: stop applications crashing when drm_wait_vblank is called (bug #13265)
Linux guests: fix a crash in gnome-session (bug #13335)
X11 guests: do not start VBoxClient over an SSH connection (bug #13107)
X11 guests: added support for X.Org Server 1.16 (bug #13207)
X11 guests: fixed a wrong parameter in the video driver which caused problems with full-screen X11 clients (bug #2748)
VirtualKD: introduced stub/loader device for speeding up Windows kernel debugging, details see http://virtualkd.sysprogs.org/

Changes for v4.3.12 - v4.3.14

VMM: more fixes for MSR emulation on certain hardware (bugs #12784, #12949, #13034)
VMM: improve MSI handling under rare circumstances (only relevant for the ICH9 chipset)
VMM: fixed #UD exception for 64-bit guests with the EFER.SCE bit and the SYSCALL instruction (VT-x only; 4.3 regression; bug #13008)
VMM: fixed timekeeping after resuming SMP guests
VMM: properly wake up a halted VCPU on NMI/SMI
GUI: fixed a potential crash
GUI: fixed stuck AltGr key on Windows hosts (bug #2537)
GUI: fixed a potential error during the version check
GUI: shortcut change should not require Enter/Return (or other trigger) to confirm (bugs #12828, #12847, #12937, #13087)
GUI: fixed update check which was broken due to changing the location of the root certificates (bug #13096)
VBoxManage: fixed typo in showvminfo --machinereadable (bug #13176)
NAT: fixed inbound half-close (bug #13116)
NAT: fixed slow upload speed under certain conditions (bug #10034)
NAT Network: fixed potential loss of inbound TCP data
NAT Network: fixed potential infinite stalls of TCP connections over IPv6
NAT Network: fixed resets of TCP connections on Windows hosts
NAT Network: fixed inbound half-close on Mac OS X hosts
NAT Network: fixed socket leak on Solaris hosts
NAT Network: fixed ping of mapped host loopback on Mac OS X and Solaris hosts, fixed proxying of IMCP errors on Mac OS X
Host-Only Network: fixed SNMP ifConnectorPresent value on Windows (bug #13143)
Storage: fixed a possible crash with CD/DVD passthrough under certain circumstances
Storage: fixed a crash when trying to open an inaccessible QED or QCOW image (bug #12613)
Storage: fixed data corruption or read errors under rare circumstances
AHCI: fixed a crash under rare circumstances
USB: performance fixes
ICH9: properly reset MSI capability on reset
Keyboard: active modifier keys during suspend were stuck after resuming the host
3D: fixed misbehavior with huge guests (i.e. guest more than 4GB guest memory
3D: several fixes
API: properly detect the Windows 8.1 guest OS type (bug #13090)
ExtPack: cleanup of dangling uninstallation directories
Linux hosts / guests: compile fix for EL7 (bug #12638)
Linux Additions: made 3D pass-through work with recent versions of Mesa in the guest (bug #12941)
Linux Additions: Linux 3.16 fixes (bug #13123)
Mac OS X hosts: when scanning for host CD/DVD devices also consider BlueRay devices
OS/2 Additions: fixed gengradd.dll library name (bug #12785)
Solaris Additions: fixed permissions of files and directories located on shared folders
Windows host installer: fixed the need for rebooting Windows after installation or upgrade, extended logging for NetFlt/NetAdp (un)installation

Changes for v4.3.10 - v4.3.12

VMM: fixed an occasional Guru Meditation (Mac OS X hosts only; bugs #12727, #12954)
VMM: fixed a rare condition that would fail to invalidate guest TLB entries or would invalidate them when not required (Windows hosts only)
VMM: fixed a VERR_NOT_SUPPORTED Guru Meditation seen with certain guests, e.g. OpenServer 5.0.7
VMM: more fixes for MSR emulation on certain hardware (tickets #12240, #12875)
GUI: fixed mouse positioning with mouse integration disabled and multiple guest screens (Windows hosts only; bug #9059)
GUI: fixed crash in VM manager (bug #12878)
GUI: fixed crash under rare conditions on entering/exiting fullscreen/seamless mode
Shared Clipboard: don't stop working after taking a snapshot (bug #12700)
AHCI: fixed a crash under rare circumstances
API: fixed a hang during VM shutdown under rare conditions
NAT: fixed generation of malformed ICMP error datagrams (4.3.10 regression)
NAT: fixed potential crash in DNS proxy
NAT Network: don't drop port forwarding rules after some time
NAT: fixed ARP cache corruption and network loss in Windows guest caused by iSCSI service activity
USB: improved check if a storage device is currently mounted to the host when the device is about to be attached to the VM (Mac OS X hosts only; #11038)
3D support: several fixes, including better support for Ubuntu 14.04
VRDP: fixed a potential crash on client disconnect (bug #12858)
VBoxSVC: fixed a race when a new client is started a few seconds after the last client terminated (Windows hosts only; bugs #11309, #12509)
VBoxSVC: fixed VirtualBox.xml registry corruption after VM renaming
VBoxSVC: fixed a potential crash caused by incorrect USB device filter (Mac OS X hosts only; #11038)
Windows hosts: partly support 32-bit COM on 64-bit systems
Windows host installer: implemented merge module (msm) support
Linux hosts: fixed dependency of boot script on older Debian systems (bug #12262)
Linux guests: fix symbolic link to shared folder helper (bug #12879)
Linux Additions: don't crash VBoxService during guest execute for users without a password (bug #12994)
Linux Additions: fixed a bug in guest execution where the guest process terminated with VERR_INTERRUPTED to the host

Changes for v4.3.6 - v4.3.8

VMM: more work on improving the emulation of certain MSR registers (e.g. bugs #12224, #12544)
VMM: fixed a VERR_INVALID_RPL Guru Meditation when booting certain guests (bug #11350)
VMM: experimental support for SSE 4.1 / SSE 4.2 passthrough, see the manual for more information how to enable it (bug #8651)
VMM: fix for recent Linux kernels with software virtualization
GUI: experimental HID LEDs synchronization for Windows hosts, see the manual for more information
GUI: warn the user if the Oracle Extension Pack is not installed and the user tries to activate the remote display feature (bug #9104)
GUI: make sure that a minimized guest (using mini toolbar in fullscreen/seamless mode) keeps the minimized state (bug #12199)
GUI: popup banner's "do not show this message again" check-box replaced with corresponding button
GUI: network adapter cables can now be connected/disconnected directly through the running virtual machine Devices / Network menu a Network status-bar indicator
GUI: the new VM wizard now proposes 64-bit guests on 64-bit hosts by default; better distinction between 32-bit OS types 64-bit OS types (bug #12533)
GUI: better error message if appliance import fails (bug #12657)
GUI: allow to set host-combination to 'None' using the Global settings / Input page (bug #12730)
GUI: don't switch the guest to a black screen during online snapshot merge (4.3 regression)
VBoxManage: when exporting an appliance, support the suppression of MAC addresses, which means they will be always recreated on import, avoiding duplicate MAC addresses for VMs which are imported several times
AHCI: fixed a VM hang during suspend under certain circumstances
AHCI: fixed a VM hang during online snapshot merge under certain circumstances
AHCI: fixed a bug which resulted in Windows XP guest hangs if a SATA CDROM is attached (bug #12417)
AHCI: fixed a Guru Meditation under certain conditions
AHCI: ejecting a CD/DVD medium failed under certain conditions
AHCI: disk hotplugging fixes
NAT: transparent handling of host sleep/resume and network configuration changes if the dnsproxy is enabled or if the hostresolver is used (bug #12441)
NAT: fixed crash and misbehaviour under some circumstances with ICMP packets having TTL=1
NAT Network: fixed IPv6 reassembly
NAT Network: ping proxy implemented
OVF: fixed reading of the OVF 0.9 section element (4.3 regression; bug #12345)
OVF: several fixes
3D: several fixes, multiscreen fixes (e.g. bug #9124)
3D: include 3D content in captured videos (bug #12666)
3D: include 3D content in captured screenshot (bug #11758)
VGA: proper handling of legacy graphics modes if the Guest Additions are active (bug #6649)
USB: fixed crash during isochronous transfer under rare circumstances
BIOS: better disk geometry handling of SCSI drives
API: fix crashes in Java API clients using the XPCOM binding, happened with output parameters only (bug #11232)
VBoxSVC: documented the handling of host power management events (see the manual for more information) and added an extradata item for configuring the handling of the battery-low event (bug #9925)
VBoxSVC: fixed a bug which could trigger a crash if a VM snapshot was restored the second time and the VM has associated bandwidth groups (bug #12569)
VBoxSVC: properly detect ifconfig if located in /bin (bug #12713)
Shared Folders: fixed a failure to restore transient shared folders when starting a VM from a saved state (bug #12578)
Mac OS X hosts: fixed issue when the application icon was frozen in the dock if the bridging interface was not connected to a network (bug #12241)
Linux hosts: also consider the physical package ID when determining the number of physical CPU cores
Linux hosts / guests: don't warn in kernel log if memory allocation fails (bug #11171)
Solaris hosts: fixed the autostart SMF script (bug #11720)
Windows hosts: fixes for non-ANSI code page user names and similar environment contents (bug #12596)
Windows hosts / guests: fixed setting and using a guest user's process environment variables (relevant for Guest Control)
Windows Additions: fixed handle leaks in VBoxTray (bug #12563)
Windows Additions: fixed a crash while detecting active guest users
Windows Additions: fixed restoring backed up D3D files on XPDM -> WDDM upgrade
Guest Control: fixed setting and using a guest user's process environment variables
Linux Additions: support Enterprise Linux 6.5 kernels (bug #12505)
Linux Additions: fixed CPU hot-remove on newer Linux kernels
Linux / Solaris Additions: don't automount a shared folder which is already mounted
X11 Additions: support X.Org Server 1.15 (bug #12623)

Changes for v4.3.4 - v4.3.6

This is a maintenance release. The following items were fixed and/or added:
VMM: fixed a Guru Meditation VINF_EM_TRIPLE_FAULT caused by VMCB caching with nested paging on certain AMD CPUs (bug #12451)
VMM: fixed a Guru Meditation VERR_VMX_UNEXPECTED_INTERRUPTION_EXIT_TYPE while intercepting debug exceptions (VT-x only; bug #12410)
VMM: fixed a Guru Meditation VERR_SVM_UNEXPECTED_EXIT while intercepting debug register accesses (AMD-V only; bug #12481)
VMM: fixed a VERR_SSM_STRUCTURE_MAGIC error when trying to load a saved state made with VBox 4.3.4 when VT-x/AMD-V is disabled. Unfortunately, VBox 4.3.4 produced broken saved states for this configuration so you have to discard these states (bug #12414)
VMM: added a few more MSRs to the whitelist required by certain guests (bug #12245)
GUI: fixed deleting of inaccessible VMs (4.3 regression, bug #12205)
GUI: fixed warnings in VM settings / number of guest processors (bug #12480)
Main: don't automatically enable 64-bit guests on 64-bit hosts if VT-x/AMD-V is not available (bug #12424)
Main: always expose the DMI memory information to Windows 2012 guests (bug #12017)
Main: fixed occasional crashes on guest display resolution change (bug #7063)
Main: fixed reporting back temporary name when calling IGuestSession::DirectoryCreateTemp() (bug #12498)
API: fix for a hang when launching a GUI VM through the API, which crashes due to GUI unavailability
Storage: fix for BLKCACHE_IOERR runtime errors under rare circumstances (bug #11030)
Network: allow to start more than 5 PCNet instances (bug #12426)
E1000: if the cable was disconnected before the guest initialized the device, the link status was not properly set to 'down' after the initialization completed despite the fact that there was no connection
3D support: fixed offset of guest 3D image elements (Mac OS X Retina hosts only; bug #11021)
Solaris hosts: fixed accessing the host driver from non-global zones (4.3 regression, bug #12271)

Changes for v4.3.2 - v4.3.4

VMM: fix for a bug in the Local APIC emulation causing a BSOD when booting certain guests (4.3.0 regression; bug #12240)
VMM: fixed loading of saved states if VT-x/AMD-V was disabled (4.3.2 regression; bug #12291)
VMM: fixed single-stepping inside the guest for certain instructions (VT-x only; bug #10947)
VMM: fixed a performance issue involving APIC accesses after rebooting a VM (4.3.0 regression; VT-x only; bug #12296)
VMM: fixed TPR patching to be enabled for 32-bit guests even when the chosen guest type is 64-bit (4.3.0 regression; AMD-V only)
VMM: fixed occasional VINF_EM_TRIPLE_FAULT errors on hosts without the unrestricted guest execution feature (bug #12198)
GUI: don't bother the user with the BPP warning if no Guest Additions are installed
GUI: fixed machine-window paint artifacts on VM reboot / guest-screen resize
GUI: make sure the assigned license and description are attached to the exported appliance
GUI: fixed bugs in close VM action restrictions handling (bug #12333)
GUI: fixed incorrect wizards text colors for some unusual look and feel styles (bug #11743)
GUI: should restore seamless mode as soon as possible after VM reboot or shutdown
GUI: fixes for medium enumeration
GUI: the OS X hot corners were not accessible while a VirtualBox VM is running (Mac OS X hosts only; bug #4139)
GUI: fixed an old bug which bared the host from cleanly shutdown / reboot if the VM selector window is open (Mac OS X hosts only; bug #8254)
Host-only Networking: fixed creating of host-only network interfaces (4.3.0 regression; bug #12182)
NAT: don't run into an infinite loop in case the host cannot access any DNS server (4.3.0 regression; bug #12300)
NAT: don't re-connect the cable if the DNS information changes and the cable was disconnected before (4.3.0 regression; bug #12225)
NAT: fixed several issues with automatically starting / terminating of NAT networks on VM start / stop and configuration changes
VBoxNetDHCP: don't block prevent VBoxSVC from terminating (bug #12264)
2D Video acceleration: fix crashes on presentation mode switches (bug #9194)
BusLogic: allow to run VMs with more than one BusLogic SCSI controller enabled
Keyboard: fixed a VM crash if a VM was resumed from a saved state where at least one key was pressed (bug #11289)
VBoxSVC: fixed a heap corruption under certain conditions (4.3.0 regression)
VBoxSVC: fixed a race leading to a hang during initialization (bug #12349)
OVF: fixed import logic for OVF appliances containing multiple VMs
OVF: improved logic for finding an appropriate image format during OVF import
API: block the removal of the current snapshot if it has child snapshots (only relevant for VMs without snapshottable hard disks, their presence always prevented removal), which resulted in VM configuration corruption
API: mark VM configurations with snapshots but without current snapshot as inaccessible, as this combination is nonsense
API: fixed information for some automatically generated events (only with XPCOM, Windows host was not affected), which caused errors when getting some of the attributes over the webservice (bug #12379)
SDK: extended the functionality coverage for the C bindings
Guest Control: various bug fixes and improved VBoxManage help (bugs #8072, #11044, #12336, #12338, #12346, #12371)
Windows hosts: another attempt to fix the massive DPC latency (bug #6242)
Windows host installer: make registering file extensions optional, contributed by Tal Aloni (bug #8009)
Mac OS X hosts: properly sign the kernel extensions for Mavericks hosts (bug #12256)
Mac OS X hosts: fixed a bug where the VirtualBox dock icon was not properly removed from the dock after a VM terminated preventing Mavericks hosts from shutting down (bug #12241)
Mac OS X hosts: fixed minor installer issue (bug #12275)
Linux hosts / guests: Linux 3.13 compile fixes (bug #12358)
Linux guests: build the vboxvideo kernel module correctly on OL/RHEL 6.1 guests (bug #11996)
Linux guests: make 3D work on Slackware 14.1 (bug #12320 comments 3 and 4)
Guest Additions/3D: fixed an occasional dead-lock (bug #12319)
Windows Additions/3D: fixed possible memory leaking (bug #12228)
Windows Additions/XPDM: use separate tables containing valid video modes for each virtual monitor
Windows Additions: fixed automatic logins for Vista and newer Windows guests (bug #12332)

Changes for v4.3.0 - v4.3.2

MM: fixed restoring of the auxiliary TSC MSR in VT-x that caused host BSODs on Windows 8.1 hosts and unpredictable behavior on other hosts (bug #12237)
VMM: provide fake values for a couple of MSRs to make more guests happy on certain hosts
VMM: fixed detection of VT-x on certain machines where the BIOS would not set the VMX LOCK feature bit, which affected the VM settings in the GUI
VMM: fixed TPR threshold which caused BSODs on Windows XP guests that use the I/O APIC (VT-x only; bug #12227)
VMM: fixed PATM saved state incompatibility for software virtualized VMs (bug #12222)
VMM: don't fail if AMD-V isn't available if the VM is configured to use software virtualization
GUI: fixed guest resize breakage on visual representation mode change (when switching from normal to fullscreen etc)
GUI: make sure the guest screen is resized after restoring a VM from a saved state if the host screen size changed
GUI: disabled SCROLL LED sync from HID LEDs synchronization (Mac OS X hosts only)
Webcam passthrough improvements including GUI support (see the manual for more information)
Guest Control: implemented more IGuestSession methods
Guest Control: added support for deleting and renaming guest files + directories in VBoxManage
Guest Control: various bugfixes
API: incorrect handling of hardware UUID default value, resulting in an all zero DMI/SMBIOS UUID, which leads to Windows requesting re-activation (4.3 regression; bug #12244)
3D support: fixed crash on shutdown if 2D video acceleration is enabled (Mac OS X hosts only)
3D support: miscellaneous fixes
Storage: fixed detection of CD/DVD media when switching from an empty to a host drive with passthrough enabled
Storage: fixed hang of the VM process when the disk is full under certain circumstances
NAT: listen for changes of NAT Network setting at runtime
NAT: NAT Network DHCP server now saves leases to a persistent storage
Main: monitor changes in host DNS configuration
Mac OS X host: reworked a mechanism of adding a VM desktop alias from the VM selector
Mac OS X installer: remove old kernel extensions during upgrade (bug #12258)
Linux Additions: correctly set umask before installing (bug #12166)
X11 Additions/3D: fix freezes starting 3D desktop (bug #11503, thank you Sam Spilsbury)
X11 Additions/3D: fix depth buffer support (bug #11905)
X11 Additions/3D: fix Age Of Empires 3 rendering (bug #11331)
Windows Additions/3D: fix Google Earth plugin

Changes for v4.0.20 - v4.3.0

This version is a major update. The following major new features were added:
VMM: major rewrite of the VT-x code and the AMD-V code including many bug fixes and performance improvements (for example bug #9659)
VMM: introduced a lightweight instruction interpreter for situations not handled by hardware virtualization
GUI: extended messaging mechanism (new non-modal popup overlays used to show non-critical warnings and provide user with additional information)
GUI: keyboard shortcuts management (input page of global preferences extended with possibility to edit general keyboard shortcuts for VirtualBox Manager and Virtual Machine)
GUI: video capturing support (bug #4766)
Added USB touch device emulation
Added experimental support for webcam passthrough complementing USB passthrough (see the manual for more information)
Added SCSI CD-ROM emulation, including boot support
VRDP: support for IPv6
Guest Control: guest sessions now are running in dedicated, impersonated session processes (needs at least Guest Additions 4.3 installed)
Guest Control: implemented IGuestFile support
NAT: experimental virtual router mode: several VMs are attached to the same internal network and share one NAT service (see the manual for more information)
In addition, the following items were fixed and/or added:
VMM: significantly improved performance of NetWare 5.x/6.x guests on host systems without nested paging support
VMM: fixed losing host NMIs while in VT-x guest-context
VMM: changed order of actions in emulated task switch (bug #10532)
VMM: allow to activate VT-x while in SMX mode and provide more information if that is not possible
GUI: update check uses https
GUI: numerous minor internal cleanups and bug fixes
GUI: HID LEDs synchronization when switching between guest window(s) and host (Mac OS X hosts only)
GUI, VBoxManage: when unregistering a VM, also unregister the hard disk images which are used exclusively (bug #10311)
GUI: use the number of physical presented processor cores instead of the number of logical processor cores to check if the users assigned too many virtual CPUs to the guest
Snapshots: made live snapshots work again (bug #9255)
Teleportation: made it work again (bug #9455)
Storage: implemented AHA-154x compatibility mode in the emulated BusLogic SCSI HBA
Storage: significantly improved performance of large ATAPI PIO transfers (BeOS, Minix 3 guests affected)
Storage: added floppy formatting emulation (NB: cannot be used to change existing media geometry)
Settings: global and per-VM default frontend configuration, useful to select the use of alternative VM frontends
Settings: limit depth of snapshot tree to 250 levels, as more will lead to decreased performance and may trigger crashes
Settings: the per-VM hwvirtextexcl setting has been replaced by a global hwvirtexclusive property
Main: new event queue implementation which does not use the host's native event queue for processing VirtualBox events anymore
Main: eliminate the use of SysV semaphores on all host OSes other than Windows, namely Linux, Solaris and Mac OS X, with the consequence that no system reconfiguration is needed to run more than approximately 100 VMs
Main: use the XDG standard configuration folder instead of .VirtualBox on systems where it is appropriate (bug #5099)
Main: extension pack framework can now support loading HGCM modules, contributed by Jeff Westphal
VBoxManage: list more information about hard disk/DVD/floppy media, and support the --long option to show really all available details
VBoxManage: added support for optional command line parameters for the automatic Guest Additions update
VBoxManage: added support for listing active guest sessions, guest processes and/or guest files via guestcontrol list
VBoxManage: added support for closing active guest sessions via guestcontrol session close --session-id | --session-name | --all
VBoxManage: added support for terminating active guest processes via guestcontrol process kill|close|terminate --session-id | --session-name ... or guestcontrol [p[s]]kill --session-id | --session-name ...
VBoxManage: added support for watching guest sessions via guestcontrol watch
VBoxManage: added modifyvm --triplefaultreset to make the VM reset on triple fault instead of triggering a Guru Meditation (see the manual for more information)
3D support: several fixes
3D support: several fixes for Mac OS X hosts
OVF: several fixes
Extpack Installer: make it work if the file is located in a folder with special characters
Keyboard: fix for reporting key sequences like Ctrl+Alt+Del for the USB keyboard emulation
Shared Clipboard/X11: support for BMP-format images, contributed by François Revol
Mac OS X hosts: limited support for Mac OS X 10.9 (Mavericks)
Mac OS X hosts: use a launchd script instead of the deprecated StartupItem mechanism (bug #8940)
Windows hosts: don't cause massive DPC latency (only on certain hosts; still needs improving; bug #6242)
Windows hosts: consider symlinks when retrieving volume information (bug #11962)
Windows hosts: fixed an issue with USB2 devices being inaccessible when plugged into USB 3.0 ports
Windows Additions: fixed misbehavior with guest display power management (WDDM driver only; bug #11170)
Windows Additions: fixed memory leak caused by WTSQuerySessionInformation() on Windows 2000 guests (bug #12072)
Windows Additions: ability to track guest user idle times through the newly introduced event IGuestUserStateChangedEvent
Linux Additions: fixed udev detection in the init script with Linux 3.x kernels

Changes for v4.2.16 - v4.2.18

VMM: properly handle NMIs on Linux hosts with X2APIC enabled
VMM: fixed potential crashes with 64-bit guests on 32-bit hosts (bug #11979)
GUI / seamless: properly handle mouse wheel scroll events
GUI, VBoxManage: when unregistering a VM, also unregister the hard disk images which are used exclusively (bug #10311)
GUI: prevent crashes under certain conditions on X11 hosts
3D: multiscreen fixes (incorrect mouse position, flickers)
3D Support: several fixes for the Windows WDDM video driver (multiscreen, seamless)
Snapshots: made live snapshots work again (bug #9255)
Teleportation: made it work again (bug #9455)
VBoxManage: on snapshot take, --pause is default and --live is for doing live snapshots
VBoxSVC: don't crash on systems with many VLAN interfaces (Solaris hosts only)
Network: after the host resumes from suspend, disconnect and reconnect the virtual network cables to force renewing the DHCP leases for the guests. So far only Mac OS X hosts and Windows hosts (bug #10063).
NAT: on name server changes force a reconnect of the virtual network cable to notify the guest (Mac OS X hosts only)
•Mac OS X installer: keep previously installed Extension Packs on VirtualBox upgrade
Linux hosts / guests: Linux 3.11 fixes (bug #12001)
Solaris hosts: fixed a potential kernel panic caused due to unexpected preemption due to logging.
Windows hosts: fixed an issue with USB2 devices being inaccessible when plugged into USB3 ports.
Linux Additions: added PCI device identifier to vboxvideo.ko fixing DRI initialization under certain conditions (bug #11957)
Linux Additions: fixed udev detection in the init script with Linux 3.x kernels

Changes for v4.2.14 - v4.2.16

This is a maintenance release. The following items were fixed and/or added:
OVF/OVA: don't crash on import if no manifest is used (4.2.14 regression; bug #11895)
GUI: do not restore the current snapshot if we power-off after a Guru Mediation
Storage: fixed a crash when hotplugging an empty DVD drive to the VM
Storage: fixed a crash when a guest read from a DVD drive attached to the SATA controller under certain circumstances
EFI: don't fail with 64-bit guests on 32-bit hosts (bug #11456)
Autostart: fixed VM startup on OS X
Windows hosts: native Windows 8 controls
Windows hosts: restore native style on Vista 32
Windows hosts / guests: Windows 8.1 adaptions (bug #11899)
Mac OS X hosts: after removing VirtualBox with VirtualBox_Uninstall.tool, remove it from the pkgutil --pkgs list as well

Changes for v4.2.12 - v4.2.14

This is a maintenance release. The following items were fixed and/or added:
VMM: another TLB invalidation fix for non-present pages
VMM: fixed a performance regression (4.2.8 regression; bug #11674)
GUI: fixed a crash on shutdown
GUI: prevent stuck keys under certain conditions on Windows hosts (bugs #2613, #6171)
VRDP: fixed a rare crash on the guest screen resize
VRDP: allow to change VRDP parameters (including enabling/disabling the server) if the VM is paused
USB: fixed passing through devices on Mac OS X host to a VM with 2 or more virtual CPUs (bug #7462)
USB: fixed hang during isochronous transfer with certain devices (4.1 regression; Windows hosts only; bug #11839)
USB: properly handle orphaned URBs (bug #11207)
BIOS: fixed function for returning the PCI interrupt routing table (fixes NetWare 6.x guests)
BIOS: don't use the ENTER / LEAVE instructions in the BIOS as these don't work in the real mode as set up by certain guests (e.g. Plan 9 and QNX 4)
DMI: allow to configure DmiChassisType (bug #11832)
Storage: fixed lost writes if iSCSI is used with snapshots and asynchronous I/O (bug #11479)
Storage: fixed accessing certain VHDX images created by Windows 8 (bug #11502)
Storage: fixed hang when creating a snapshot using Parallels disk images (bug #9617)
3D: seamless + 3D fixes (bug #11723)
3D: version 4.2.12 was not able to read saved states of older versions under certain conditions (bug #11718)
Main/Properties: don't create a guest property for non-running VMs if the property does not exist and is about to be removed (bug #11765)
Main/Properties: don't forget to make new guest properties persistent after the VM was terminated (bug #11719)
Main/Display: don't lose seamless regions during screen resize
Main/OVF: don't crash during import if the client forgot to call Appliance::interpret() (bug #10845)
Main/OVF: don't create invalid appliances by stripping the file name if the VM name is very long (bug #11814)
Main/OVF: don't fail if the appliance contains multiple file references (bug #10689)
Main/Metrics: fixed Solaris file descriptor leak
Settings: limit depth of snapshot tree to 250 levels, as more will lead to decreased performance and may trigger crashes
VBoxManage: fixed setting the parent UUID on diff images using sethdparentuuid
Linux hosts: work around for not crashing as a result of automatic NUMA balancing which was introduced in Linux 3.8 (bug #11610)
Windows installer: force the installation of the public certificate in background (i.e. completely prevent user interaction) if the --silent command line option is specified
Windows Additions: fixed problems with partial install in the unattended case
Windows Additions: fixed display glitch with the Start button in seamless mode for some themes
Windows Additions: Seamless mode and auto-resize fixes
Windows Additions: fixed trying to to retrieve new auto-logon credentials if current ones were not processed yet
Windows Additions installer: added the /with_wddm switch to select the experimental WDDM driver by default
Linux Additions: fixed setting own timed out and aborted texts in information label of the lightdm greeter
Linux Additions: fixed compilation against Linux 3.2.0 Ubuntu kernels (4.2.12 regression as a side effect of the Debian kernel build fix; bug #11709)
X11 Additions: reduced the CPU load of VBoxClient in drag'and'drop mode
OS/2 Additions: made the mouse wheel work (bug #6793)
Guest Additions: fixed problems copying and pasting between two guests on an X11 host

Changes for v4.2.10 - v4.2.12

VMM: fixed a Guru Meditation on putting Linux guest CPU online if nested paging is disabled
VMM: invalidate TLB entries even for non-present pages
GUI: Multi-screen support: fixed a crash on visual-mode change
GUI: Multi-screen support: disabled guest-screens should now remain disabled on visual-mode change
GUI: Multi-screen support: handle host/guest screen plugging/unplugging in different visual-modes
GUI: Multi-screen support: seamless mode: fixed a bug when empty seamless screens were represented by fullscreen windows
GUI: Multi-screen support: each machine window in multi-screen configuration should have correct menu-bar now (Mac OS X hosts)
GUI: Multi-screen support: machine window View menu should have correct content in seamless/fullscreen mode now (Mac OS X hosts)
GUI: VM manager: vertical scroll-bars should be now updated on content/window resize
GUI: VM settings: fixed crash on machine state-change event
GUI: don't show warnings about enabled or disabled mouse integration if the VM was restored from a saved state
Virtio-net: properly announce that the guest has to handle partial TCP checksums (bug #9380)
Storage: Fixed incorrect alignment of VDI images causing disk size changes when using snapshots (bug #11597)
Audio: fixed broken ALSA & PulseAudio on some Linux hosts due to invalid symbol resolution (bug #11615)
PS/2 keyboard: re-apply keyboard repeat delay and rate after a VM was restored from a saved state (bug #10933)
BIOS: updated DMI processor information table (type 4): corrected L1 & L2 cache table handles
Timekeeping: fix several issues which can lead to incorrect time, Solaris guests sporadically showed time going briefly back to Jan 1 1970
Main/Metrics: disk metrics are collected properly when software RAID, symbolic links or rootfs are used on Linux hosts
VBoxManage: don't stay paused after a snapshot was created and the VM was running before
VBoxManage: introduced controlvm nicpromisc (bug #11423)
VBoxManage: don't crash on controlvm guestmemoryballoon if the VM isn't running (bug #11639)
VBoxHeadless: don't filter guest property events as this would affect all clients (bug #11644)
Guest control: prevent double CR in the output generated by guest commands and do NLS conversion
Linux hosts / guests: fixed build errors on Linux 3.5 and newer kernels if the CONFIG_UIDGID_STRICT_TYPE_CHECKS config option is enabled (bug #11664)
Linux Additions: handle fall-back to VESA driver on RedHat-based guests if vboxvideo cannot be loaded
Linux Additions: RHEL/OEL/CentOS 6.4 compile fix (bug #11586)
Linux Additions: Debian Linux kernel 3.2.0-4 (3.2.39) compile fix (bug #11634)
Linux Additions: added auto-logon support for Linux guests using LightDM as the display manager
Windows Additions: Support for multimonitor. Dynamic enable/disable of secondary virtual monitors. Support for XPDM/WDDM based guests
X11 Additions: support X.Org Server 1.14 (bug #11609)

Changes for v4.2.8 - v4.2.10

GUI: fixed keyboard with XQuartz X server
Main/Display: fixed a crash with multi-monitors under certain conditions (Mac OS X hosts only)
Main/Properties: fixed a crash under certain conditions, for example after wakeup from host hibernate
Settings: don't lose the internal network settings if they are not currently active
Storage: another incompatibility fix for VHD differencing images with Hyper-V
VBoxManage: don't read beyond the end of the file specified with export --eulafile
Linux hosts / guests: Linux 3.9-rc0 compile fixes
Linux Additions: fixed two warnings in the shared folders guest kernel module
Linux Additions: don't crash VBoxService if libdbus is not available
Windows Additions: fixed upgrading MultiMedia Redirection (MMR) support

Changes for v4.2.4 - v4.2.6

VMM: don't inject stale VT-x events to prevent crashes after VM reset (bug #11256)
VMM: workaround for buggy BIOSes which enable MONITOR only for certain CPUs (bugs #9460, #10686)
GUI: fixed trimming of anti-aliased text in details-view element headers (4.2.0 regression)
GUI: fixed create-settings-file-alias functionality on Mac hosts (4.2.0 regression)
GUI: fixed take-guest-screenshot functionality on Windows hosts (bug #11095)
GUI: several minor fixes, including palette fixes (bug #11191)
GUI: fixed Windows 2012 OS type (bug #11206)
GUI: allow to terminate the VM even if VBoxSVC crashed
API: fixed cancelling of snapshots, previously this could lead to inconsistent VM configs (bug #6877)
API: fixed identifying disk images by UUID (bug #11209)
3D Support: several fixes
VRDP: fixed occasional crash with external authentication (bug #11156)
VGA: fix for double scan text modes
USB: fixed invalid pending request count at the time of service of DEVICE POWER requests (Windows hosts only; bugs #10021, #11056)
USB keyboard: Korean keyboard workaround (bug #11150)
Storage: fixed hang with QCOW images and asynchronous I/O enabled
Storage: fixed hang with newer VHD images (bug #11279)
Storage: actually write the non-rotational flag to the VM settings (4.2.0 regression)
Virtio-net: fixed the problem with network statistics counters in Session Information dialog (GUI)
Metrics: introduced network rate and disk usage metrics
Metrics: fixed a crash under certain conditions on Solaris hosts
BIOS: fix for El Torito
Shared Folders: if the host folder of a shared folder mapping does not exist, keep it active but mark it as invalid to prevent inconsitent saved states (bug #11147)
VBoxManage: fixed converting disks from raw images
VBoxManage: show snapshot description in the VM or snapshot information
VBoxManage: make implicit opening of media consistent in all places dealing with media
VBoxManage: the iSCSI initiator name was not stored in the settings file when doing storageattach (bug #11212)
VBoxManage: metrics collect now properly handles 'CPU/MHz' and 'Net/*/LinkSpeed' metrics
VBoxManage: changing the image UUID or parent UUID as part of storageattach works now in all safe cases
VBoxManage: introduced storageattach --medium additions as a shortcut to mount the additions image (bug #11165)
OVF: fixed importing OVF files cerated by recent VMware products (bug #10905)
Linux hosts / Bridged Networking: fixed the problem with leaking connections in conntrack (bug #11178)
Linux Additions: added support for ConsoleKit sessions in the vminfo service of VBoxService
Linux Additions: don't crash during remount under certain conditions (bug #11291)
Linux/Solaris Additions: fixed guest memory metrics collection
Solaris hosts: added a dependency to ensure that the user directories are reachable when starting VBox services
Windows host installer: integrated user-contributed translations, thanks to all contributors!
Windows Additions: fixed auto-logon installation for Windows 8
Windows Additions: don't fail if the shared folders host service is not available
Windows Additions: fixed Guest Additions startup on Windows 2000 guests (bug #11253)
Windows Additions: auto-resize fixes for Windows 8 guests

Changes for v4.2.2 - v4.2.4

GUI: fixed validation warning on global settings / proxy page (4.2.2 regression, bug #11089)
GUI: fixed crash with multiple guest screens on certain conditions (OS X hosts only)
VBoxBalloonCtrl: fixed command line argument handling of ballooning module
VRDP: fixed occasional crash during a video playback in the guest (bug #11082)
BIOS: fixed broken DMI information (4.2 regression)
BIOS: workaround for booting from Windows 2000 floppy disks
EFI: fixed video mode selection loss on VM reboot (#10983)
Parallel: fixed parallel port printing failure/ paper queue empty error (Windows hosts only; bug #2226)
NAT: fixed crash on alias-less DNS responses when host-resolver is used
Storage: fixed hang under rare circumstances

Changes for v4.1.22 - v4.2.0 RC 4

VMM: fixed a potential host crash triggered by shutting down a VM when another VM was running (only affected 32-bit hosts and 64-bit OS X hosts, 4.1 regression, bug #9897)
VMM: fixed a potential host crash under a high guest memory pressure (seen with Windows 8 guests)
GUI: a couple of VM group related fixes
3D Support: WDDM: fixed fullscreen without Aero
NAT: fixed memory leak when disabling the NAT engine
OS X host: installer fixes
Windows Additions: fixed memory leak in VBoxTray (bug #10808)

Changes for v4.1.20 - v4.1.22

This is a maintenance release. The following items were fixed and/or added:
VMM: fixed a potential host crash triggered by shutting down a VM when another VM was running (only affected 32-bit hosts and 64-bit OS X hosts, 4.1 regression, bug #9897)
VMM: fixed a potential host crash under a high guest memory pressure (seen with Windows 8 guests)
VMM: respect RAM preallocation while restoring saved state.
VMM: fixed handling of task gates if VT-x/AMD-V is disabled
Storage: fixed audio CD passthrough for certain media players
USB: don't crash if a USB device is plugged or unplugged when saving or loading the VM state (SMP guests only)
RTC: fixed a potential corruption of CMOS bank 1
Mac OS X hosts: installer fixes for Leopard (4.1.20 regression)
Windows Additions: fixed memory leak in VBoxTray

Changes for v4.1.18 - v4.1.20

This is a maintenance release. The following items were fixed and/or added:
VMM: fixed a crash under rare circumstances for VMs running without hardware virtualization
VMM: fixed a code analysis bug for certain displacement instructions for VMs running without hardware virtualization
VMM: fixed an interpretion bug for TPR read instructions under rare conditions (AMD-V only)
Snapshots: fixed a crash when restoring an old snapshot when powering off a VM (bugs #9604, #10491)
VBoxSVC: be more tolerant against environment variables with strange encodings (bug #8780)
VGA: fixed wrong access check which might cause a crash under certain conditions
NAT: final fix for crashes under rare conditions (bug #10513)
Virtio-net: fixed the problem with receiving of GSO packets in Windows XP guests causing packet loss in host-to-VM transfers
HPET: several fixes (bugs #10170, #10306)
Clipboard: disable the clipboard by default for new VMs
BIOS: the PCI BIOS was not properly detected with the chipset type set to ICH9 (bugs #9301, #10327)
Mac OS X hosts: adaptions to Mountain Lion
Linux Installer: fixes for Gentoo Linux (bug #10642)
Linux guests: fixed mouse integration on Fedora 17 guests (bug #2306)
Linux Additions: compile fixes for RHEL/CentOS 6.3 (bug #10756)
Linux Additions: compile fixes for Linux 3.5-rc1 and Linux 3.6-rc1 (bug #10709)
Solaris host: fixed a guru meditation while allocating large pages (bug #10600)
Solaris host: fixed possible kernel panics while freeing memory
Solaris Installer: fixed missing icon for menu and desktop shortcuts

Changes for v4.1.16 - v4.1.18

This is a maintenance release. The following items were fixed and/or added:
VMM: fixed VERR_REM_VIRTUAL_CPU_ERROR under rare conditions after the guest has been reset (bug #5164 and others)
VMM: fixed host freezes with 64-bit guests on 32-bit Linux hosts (bug #10528)
VRDP: added a workaround for rdesktop clients not properly updating the screen size when minimized
AHCI: fixed a rare bug which can cause a guest memory corruption after the guest storage controler has been reset
NAT: another attempt to fix crashes under rare conditions (Windows hosts only; bug #10513)
Mac OS X hosts: addressed issues running Leopard / Snow Leopard (bug #10631)
Linux hosts / Bridged Networking: fixed the problem with device driver unloading on kernels 3.2.18 and newer due to an invalid reference counter (bug #10624)
Linux hosts / guests: Linux 3.5-rc1 fixes
Linux Additions: the guest content was sometimes not properly updated (bug #9887)
Solaris Additions: installer fix for X.org Server 1.11 and 1.12

Changes for v4.1.12 - v4.1.14

This is a maintenance release. The following items were fixed and/or added:
Network: fixed the problem with packets larger than MTU-4 when PCnet or PRO/1000 was bridged to certain types of adapters on OS X hosts
NAT: fixed a segfault under rare circumstances
3D Support: fixed Windows WDDM video driver crash for SMP guests
Windows Guest Additions, VRDP: fixed occasional text corruption

Changes for v4.1.10 - v4.1.12

This is a maintenance release. The following items were fixed and/or added:
VMM: fixed VERR_NOT_SUPPORTED and VERR_RAW_MODE_INVALID_SMP guru meditation due to an invalid reschedule to raw mode (bug #10370)
VMM: fixed PDMCritSectLeave guru meditation under rare circumstances with SMP guests
VMM: proper Math Fault handling with certain legacy guests (bug #9042)
NAT: fixed a socket leak under certain conditions
Storage: better sanity check against reading beyond end-of-file
Audio: fixed a crash in the NUL audio backend (bug #10374; 4.1.10 regression)
HGCM: fixed a crash during savestate under rare circumstances
VBoxSVC: several locking fixes
VBoxManage: return the correct error code if controlvm savestate failed (bug #10134)
Guest Additions: VBoxService should not crash on exit (bug #10326; 4.1.10 regression)
Windows Additions: set the correct time stamp when a file is closed (bug #6473)
Windows Additions: better help if the DirectX backups are not properly installed
Linux Additions: Linux 3.4-rc1 compile fixes

Changes for v4.1.8 - v4.1.10

This is a maintenance release. The following items were fixed and/or added:
GUI: if 3D support on the host is not available for some reason, do not only disable this VM setting but also uncheck the checkbox
VMM: fixed a potential problem causing to schedule interrupts during SYSEXIT right after STI
VMM: fixed a potential guest memory corruption issue with page fusion
VMM: adjusted the module matching algorithm for page fusion a little, generally resulting in slightly more shared pages
Main: host interfaces no longer have "defaults" for IP address and network mask attributes
Main: don't depend on a password for certain guest control operations (bug #10030)
3D Support: fixed Windows XP hosts support (4.1.8 regression; bugs #10071 and #10088)
3D Support: rendering fixes for Linux hosts with NVIDIA graphics
3D Support: fixed saved state issues (4.1.8 regression; bug #10126)
3D Support: WDDM driver: fixed powershell_ise crashes (bug #10167), make WPF-based apps work with Aero enabled, fixed additional possible WinSAT crashes
VRDP: fixed remote clipboard compatibility issues with some clients
Storage: fixed a possible data corruption when compacting VDI or VHD images with snapshots (32-bit hosts only)
iSCSI: fixed crash when using incorrect credentials when authenticating with a LIO target (bug #10173)
Serial: don't abort in host mode under rare error conditions (non-Windows hosts only)
SDK: actually ship current C bindings
SDK: fixed the Java glue code for JDK 1.7.0 (bug #9848)
SDK: added Python example
Metrics: make metrics collection more robust regarding blocked VMs
Web service: added SSL/TLS support
VBoxShell: fixed Guest Additions information lookup
Solaris installer: fixed dependency checking while installing VirtualBox in a zone
Linux hosts/guests: Linux 3.3-rc1 compile fixes
Solaris hosts: fixed debug kernel panics while opening module CTF data (bug #9651)
Mac OS X hosts: fixed Python support on Lion
Linux Additions: make 3D passthrough work on OL/RHEL 6.2 (bug #10010)
Linux Additions: fixed missing implementation when copying shared folder data through kernel high memory (bug #9878)
Linux Additions: make sure all data is written when closing a memory mapped file on a shared folder
Linux Additions: added support for X.Org Server 1.12
Solaris Additions: fixed guest kernel driver to load properly on guest reboot (4.1.8 regression; bug #10113)
Solaris Additions: fixed missing 64-bit OpenGL library VBoxOGL.so (bug #10151)
Solaris Additions: fixed VBoxService import and start for Solaris 11 guests.
Windows Additions: some Windows 8 adaptions
Windows Additions: several fixes for shared folders (bug #9753)
Guest control: miscellaneous bugfixes

Changes for v4.1.4 - v4.1.6

VRDP: fixed screen corruption
NAT: the interface stopped working after a lot of failed ICMP requests (bug #9371)
E1000: fixed rare Windows 7 guest hangs, either at boot time or when reconfiguring the network card in unusual setups (bug #6223)
ATA: fixed a possible crash during ATAPI passthrough with certain guests
ATA: improved compatibility with ancient Linux kernels
Main: fixed incorrect framebuffer information after leaving the fullscreen mode with X11 guests, this lead to a scrambled preview window in the GUI for example
Mac OS X hosts: fixed the problem with duplicate packets when bridged to a wireless interface (bug #9648)
Linux hosts: fix for 3D support on Fedora 15 (bug #9799)
Linux hosts: don't call del_timer_sync from an interrupt context (Fedora bug report 746331)
Windows Vista and 7 guests: more WDDM fixes
Linux Additions: fixed kernel module compilation failure on Redhat Enterprise Linux 4 (bug #9709)
Linux Additions: install the DRI driver correctly on Ubuntu 11.10 guests
Solaris Additions: added read-only mmap support for shared folders
Solaris Additions: added directory, file mode and mask options for shared folders
Windows Additions: implemented faster detection of logged-in guest users and stale sessions
X.Org Additions: fixed graphical corruption when switching to a virtual terminal (bug #9490)

Changes for v4.1.2 - v4.1.4

VMM: fixed PAE guests running on 32-bit hosts (4.0 regression; bug #9458)
VMM: fixed INVALID_PARAMETER guru meditation caused by insufficient memory conditions (4.1.0 regression; bug #9240)
VMM: fixed clobbered CPU registers during stos/lods/ins/outs emulation under rare circumstances
VMM: another fix for 64-bit guests on recent AMD CPUs
GUI: warn the user if he uses an outdated extension pack and allow to download and upgrade in that case (bug #8025)
GUI: fixed spurious LCtrl key events on some Windows hosts (4.0.6 regression; bug #373)
VBoxManage: another fix for extpack install --replace (bug #9308)
VBoxManage: allow to specify the UUID of the target image in convertfromraw
VRDP: fixed a rare crash when two or more clients connect to the server (bug #9503)
VRDP: fixed a case when a client was not resized correctly (bug #9242)
USB: make device capturing work on Windows hosts with usbhub class filter drivers installed (bug #9298); bugfixes for Windows host USB support
VHD: fixed reads crossing block boundaries (bug #8532)
VMDK: fixed progress indicator when creating split VMDK images
Floppy: fixed medium size detection for physical mediums (Windows hosts only)
Main: fixed VM initialization if a shared folder does not exist (bug #7941)
Main: fixed possible deadlock between hard disk enumeration and resetting of immutable disks (bug #9549)
Main: fixed not detaching of virtual storage after a snapshot restore operation (bug #8296)
Main: always reset modified state after restoring a snapshot (bug #9387)
Main: fixed writing of changed VM settings to disk when using snapshots (bug #8932)
Main: fixed taking screen shots (e.g. the preview window) for headless VMs if the Guest Additions are active
Virtio-net: fixed the problem with UDP packets exceeding MTU (bug #9370)
3D Support: fixed incorrect rendering and possible crashes when switching to/from fullscreen with enabled 2D acceleration
3D Support: fixed compiz under ubuntu 9.10
Guest control: Miscellaneous small bugfixes
Linux / Solaris hosts: don't use hard links in packages (4.1.2 regression; bug #9441)
Mac OS X hosts: fix installation issues when installed as root (bug #1578)
Mac OS X hosts: fixed packet capture issues with vboxnetX host-only interfaces (bug #8076)
Solaris hosts: fixed incoming multicast packets for Crossbow based bridged networking (bug #9532)
Solaris hosts: fixed starting EFI guests due to missing EFI ROM files (bug #9535)
Windows hosts installer: fixed ADDLOCAL usage on command line (4.1.0 regression; bug #9488)
Windows hosts installer: fixed dangling shortcut to the .chm help file (bug #9646)
Windows hosts installer: try to fix installation error 2869 which appeared under certain circumstances (bug #9664)
Windows hosts: VBoxHeadless should never open a separate console window (bug #3549)
Guest Additions: fixed hang while waiting for guest execution output (4.1.2 regression; bug #9446)
Linux Additions: add support for X.Org Server 1.11 (bug #9519)
Linux Additions: suppress an incorrect error message and allow a shared folder to be mounted in multiple places (bug #9627)
Linux Additions: start VBoxService correctly on openSUSE 12.1 (bug #6229)
Linux Additions: properly finish the installation even if the compilation of the DRM module fails (which is not fatal)
Solaris Additions: fixed memory leaks and panics while mounting (from console) and unmounting shared folders.
Windows Additions: fixed swapped mouse cursor hotspot coordinates (4.1.0 regression; bug #9447)
Windows Additions: fixed PAGE_FAULT_IN_NONPAGED_AREA BSOD in VBoxDisp.dll when running SnippingTool (bug #9508)
Windows Additions: make image viewer work correctly with Aero enabled (Vista and Windows 7)
Windows Additions: fixed incorrect window border blurs under Aero with ATI cards (Vista and Windows 7)
Windows Additions: fixed incorrect rendering when moving 3D applications outside guest desktop and back under Aero (Vista and Windows 7)
Windows Additions: fixed guest hangs when switching back from fullscreen text mode apps (bug #9636)

Changes for v4.1.0 - v4.1.2

VMM: fixed 64-bit guests on AMD Fusion CPUs (bug #8824)
VMM: fixed handling of the sysenter/sysexit machine instructions in 64-bit guests on Intel hosts
GUI: added linked clone support
GUI: fixed error check when changing the VM controller settings (4.1.0 regression; bug #9246)
GUI: fixed the inclusion of additional information (license, vendor, ...) on OVF export
GUI: when taking a snapshot from the VM selector, don't do a live snapshot
GUI: fixed immediate crash during start on certain environments due to a library version conflict
Guest control execution: implemented copying single files from guest to the host (directories and filters not supported yet)
Guest control execution: limited to serve up to 5 guest processes at a time by default
Main: return the correct RDP default port fixing settings warnings in the GUI if the remote display was enabled at runtime (bug #9368)
VBoxSVC: made the path comparison OS independent when images are registered (bug #9303)
VBoxSVC: several fixes/performance improvements for cloning of VMs
Snapshots: fixed "Solid-State drive" flag survival on snapshot creation (bug #9379)
VBoxManage: implemented copyfrom and stat guest control tools to copy files from guest to host and to check for existence of files on the guest
VBoxManage: fixed extpack install --replace (bug #9308)
VBoxManage: allow to start multiple VMs with startvm
VBoxManage: experimental support for SATA CD/DVD hotplugging
Mouse support: fixed an off-by-one pointer position error affecting Windows guests (bugs #7566, #9321)
VRDP: fixed a case when the screen was not redrawn correctly (bug #9242)
NAT: changed TCP connection establishment according to Winsock API requirements (Windows hosts only; bug #8919)
USB: fixed device recognition issues (bugs #9299) and fixed several device capturing issues (Windows hosts; bug #9299)
USB: fixed issues with remote filters being applied to local USB devices
OVA: fixed import of renamed OVA files (bug #9033)
Windows host: fixed icon for .VDI files (bug #9393)
Solaris hosts: fixed a bug preventing parallel usage of multiple host NICs with Crossbow based bridged networking
Linux hosts: fixed random kernel panics on host suspend / shutdown (4.1.0 regression; bug #9305)
Guest Additions: keep logged in user count in out-of-memory situations and warn about it
Solaris Additions: fixed shared folders due to missing symbols in the vboxfs module (4.0.12 / 4.1.0 regression; bug #9264)
Windows Additions: fixed file truncation on a shared folder with some applications (bugs #9276, #9315)
Windows Additions: fixed shared folder issues with antivirus software and 64 bit Windows guests (bug #9318)
Windows Vista and 7 guests: WDDM driver fixes and performance enhancements, fixed WinSAT crashes (#9267)
Linux Additions: fixed llseek() for Linux kernels 2.6.37 and above

Changes for v4.0.12 - v4.1.0

This version is a major update. The following major new features were added:
Support for cloning of VMs (bug #5853, see the manual for more information): full clones can be created through the GUI and VBoxManage, linked clones only through VBoxManage
GUI: enhanced wizard for creating new virtual disks
GUI: new wizard for copying virtual disks
GUI: keep the aspect ratio in scale mode (Windows and OSX hosts only; bug #7822)
VMM: raised the memory limit for 64-bit hosts to 1TB
Experimental support for PCI passthrough for Linux hosts, see the manual for more information
Windows guests: Experimental WDDM graphics driver, supporting Windows Aero (bug #4607) and providing Direct3D support using a cleaner approach (no need to install the guest drivers in Safe Mode anymore)
Guest Additions: status of modules and features can now be queried separately by the frontends
Networking: new network attachment mode "Generic Driver", which offers an open plugin architecture for arbitrary and separately distributable virtual network implementations
Host-only Networking: fixed host crash in kernels prior to 2.6.29
New Networking Mode UDP Tunnel: allows to interconnect VMs running on different hosts easily and transparently, see the manual for more information
Experimental support for SATA hard disk hotplugging available with VBoxManage
Solaris hosts: New Crossbow based bridged networking driver for Solaris 11 build 159 and above
In addition, the following items were fixed and/or added:
VMM: more SMP timer fixes
VMM: fixed sporadic recompiler crashes with SMP guests
VMM: many small fixes
GUI: when reverting to a snapshot, ask for taking a snapshot of the current state
GUI: added a View menu
GUI: added a setting for the promiscuous mode policy for internal networks, bridged networks and host-only networks
GUI: added slider for setting the CPU execution cap allowing to limit the amount of CPU time spent for the execution of the guest, see the manual for more information.
GUI: the VM description is editable during the runtime of a VM (bug #1551)
GUI: added proxy settings (bug #2870)
GUI: made the number of SATA ports configurable
GUI: decrease time before showing the VM configuration dialog
VBoxManage: more convenient configuration of storage controller attachments by automatically determining the port or device parameter when a storage controller has only one port or device per port
VBoxManage: changed syntax of the guestcontrol command group, fixed various bugs, removed obsolete options
VBoxBalloonCtrl: new service for automatic dynamic adjustment of the balloon size for running VMs
Settings: machine names and snapshot names are not allowed to be a valid UUID
Settings: provide better diagnostics if a single medium is used twice in a VM configuration
Settings: provide better diagnostics for errors in medium create/merge/clone operations, and fix memory leaks in error cases
Storage: ATA/SATA drives can be marked as non-rotational, i.e. the guest OS will detect them as a SSD if supported, which can improve performance
Storage: virtual CD/DVD images will be detached if the guest ejects the medium, unless the drive is marked to handle ejects only on a temporary basis
Storage: the medium UUID can be changed again when attaching a medium for the first time, which allows using images which are exact duplicates including the UUID
Storage: fixed possible data corruption under certain circumstances with VHD and Parallels images (bug #9150)
Storage: fixed unnecessary expansion when cloning differential images in VDI format
Storage: fixed detection code to handle empty files for VDI and VMDK format
Storage: fixed access to CD/DVD images beyond 4GB when using the SATA controller (bug #8592)
Floppy: several bugs have been fixed
Floppy: make it possible to unmount a host floppy disk (bug #6651)
BIOS: disk-related structures are now checksummed correctly (bug #8739)
USB: many fixes for the Windows USB host driver
NAT: reduced memory footprint
Networking: fixed the problem with segmentation offloading when several VMs are transmitting in parallel
Networking: workaround for a bug in wireshark when operating directly on a capture file created by VirtualBox
Serial: announce the serial devices in the ACPI tables to make Windows guests find the virtual hardware (bug #7411)
VRDP: support for TLS connections (see the manual for more information)
VRDP: support for multimonitor client configurations with MS RDP clients
VRDP: fixed a rare screen corruption
3D support: fixed GL_VERSION string for different locales (bug #8916)
Webservice: fixed timeout handling with HTTP 1.1 keepalive, and be more robust when connections fail
VBoxSVC: fixed regression when several clients trigger autostart simultaneously
Main: fixed incorrect handling of the medium location for media which are not file based (e.g. iSCSI), which resulted in confusing location values in many places
JAX-WS client bindings: fixed resource leak
Sources: fixed USB 2.0 support using extension packs for non-official builds
Mac OS X hosts: fixed non-VT-x mode on Lion hosts
Windows hosts: fixed copy'n'paste in the GUI and for the VM window (bug #4491)
Windows hosts (64-bit only): enabled removing of all mediums when removing a VM
Windows hosts (64-bit only): enabled live snapshot deletion
Windows hosts: use native controls in the installer (bug #5520)
Solaris hosts: fixed preemption issue with Solaris 11 hosts (builds 166 and above)
Solaris hosts: better control of USB device access on Solaris 11 hosts
Guest Additions: improved driver installation on Windows guests
Guest Additions: fixed high CPU usage while executing guest programs from the host
Solaris Additions: fixed automounting of shared folders (bug #8014)

Changes for v4.0.10 - v4.0.12

This is a maintenance release. The following items were fixed and/or added:
Mac OS X hosts: Lion fixes
Solaris hosts: fixed preemption issue with Solaris 11 hosts (builds 166 and above)
VBoxManage: more convenient configuration of storage controller attachments by automatically determining the port or device parameter when a storage controller has only one port or device per port (bug #9188)
Storage: fixed possible data corruption under certain circumstances whith VHD and Parallels images (bug #9150)
Storage: fixed access to CD/DVD images beyond 4GB when using the SATA controller (bug #8592)
Floppy: make it possible to unmount a host floppy disk (bug #6651)
Networking: fixed the problem with segmentation offloading when several VMs were transmitting at once
3D support: fixed GL_VERSION string for different locales (bug #8916)
Sources: fixed USB 2.0 support using extension packs for non-official builds
Solaris Additions: fixed automounting of shared folders (bug #8014)

Changes for v4.0.8 - v4.0.10

This is a maintenance release. The following items were fixed and/or added:
GUI: fixed disappearing settings widgets on KDE hosts (bug #6809)
Storage: fixed hang under rare circumstances with flat VMDK images
Storage: a saved VM could not be restored under certain circumstances after the host kernel was updated (bug #8983)
Storage: refuse to create a medium with an invalid variant (for example Split2G with VDI; bug #7227)
Snapshots: none of the hard disk attachments must be attached to another VM in normal mode when creating a snapshot
USB: fixed occasional VM hangs with SMP guests (bug #4580)
USB: proper device detection on RHEL/OEL/CentOS 5 guests (partial fix for bug #8978)
ACPI: force the ACPI timer to return monotonic values for improve behavior with SMP Linux guests (bug #8511 and others)
RDP: fixed screen corruption under rare circumstances (bug #8977)
rdesktop-vrdp: updated to version 1.7.0
OVF: under rare circumstances some data at the end of a VMDK file was not written during export
Mac OS X hosts: Lion fixes (bug #8903)
Mac OS X hosts: GNOME 3 fix
Linux hosts: fixed VT-x detection on Linux 3.0 hosts (bug #9071)
Linux hosts: fixed Python 2.7 bindings in the universal Linux binaries
Windows hosts: fixed leak of thread and process handles
Windows Additions: fixed bug when determining the extended version of the Guest Additions (4.0.8 regression; bug #8948)
Solaris Additions: fixed installation to 64-bit Solaris 10u9 guests (4.0.8 regression)
Linux Additions: RHEL6.1/OL6.1 compile fix
Linux Additions: fixed a memory leak during VBoxManage guestcontrol execute (bug #9068)

Changes for v4.0.6 - v4.0.8

Mac OS X hosts: fixed incompatibility with recent Mac OS X versions in 64-bit mode
Mac OS X hosts: fixed incompatibility with hosts with more than 16 cores
Mac OS X hosts: fixed painting corruptions on a second monitor in 64-bit mode
GUI: restored functionality to set an empty host key to disallow any host key combination
VBoxManage: added controlvm screenshotpng subcommand for saving the screenshot of a running VM in PNG format
VBoxHeadless: fixed potential crash during shutdown (Windows hosts only)
NAT: built-in services use the correct Ethernet addresses in Ethernet header and in ARP requests
Host-only networking: fixed adapter reference counting
E1000: fixed rare guest crashes with Linux SMP guests
SATA: fixed guest disk corruption under rare circumstances (only relevant for guests with more than 2GB RAM;
Storage: fixed data corruption after a snapshot was taken with asynchronous I/O enabled
Floppy: several improvement
HPET: another fix for time jumps
USB: removed assumption that string descriptors are null-terminated (Windows hosts only)
3D support: fixed a potential crash when resizing the guest window
3D support: fixed GNOME 3 rendering under Ubuntu 11.04 and Fedora 15
Snapshots: fixed another bug which could lose entries in the media registry when restoring a snapshot
Shared Folders: don't stop mounting the other valid folders if one host folder is inaccessible
Linux Additions: check whether gcc and make are installed before building kernel modules
Solaris Additions: added support for X.Org Server 1.10
Guest Additions: fixed inappropriate Guest Additions update notification when using vendor-specific version suffixes

Changes for v4.0.4 - v4.0.6

VMM: fixed incorrect handling of ballooned pages when restoring a VMM from a saved state
VMM: don't crash on hosts with more than 64 cores / hyperthreads; implemented support for up to 256 host cores (except Windows hosts; bug #8489)
VMM: fixed guru meditation for PAE guests running on hosts without PAE (bug #8006)
VMM: fixed slow Linux guests with raw mode and recent guest kernels (bug #8726)
GUI: support host key combinations (bug #979)
GUI: fixed progress indicator (bug #7814)
GUI: show the mouse pointer while the VM is paused if the USB tablet mouse emulation is used (bug #6799)
GUI: adapt the snapshot folder as well when renaming a VM (bug #8469)
GUI: persistently remember the last folders of the disk/DVD/floppy selectors
GUI: never allow to start a VM with USB-2.0 activated if the proper extension pack is missing (bug #8182)
GUI: fixed hang/crash when opening a file dialog in an non-existing folder (bug #8673)
Snapshots: fixed a bug which could lose entries in the media registry when restoring a snapshot (bug #8363)
Snapshots: allow snapshots to be stored in the VM directory
3D support: fixed a crash if a VM was forced to terminate (Windows hosts only; bug #7133)
Storage: fixed memory leak (4.0 regression; bug #7966)
Storage: fixed access to iSCSI targets over internal network
Storage: fixed reading from disks with more than one snapshot for VHD and VMDK images with disabled host cache (bug #8408)
Storage: fixed a possible hang during VM suspend after an I/O error occurred
Storage: fixed a possible hang during VM suspend / reset (bug #8276, #8294)
Storage: automatically create a diff image when attaching a streamOptimized VMDK image to a VM
ATA/SATA: fixed automounting of virtual CD/DVD mediums with recent Linux distributions by correctly reporting the current profile as 'none' if no medium is present
Buslogic: fixed emulation for certain guests (e.g. jRockit VE)
Host-Only Networking: fixed interface creation failure on Windows hosts (4.0.4 regression; bug #8362)
Host-Only & Bridged & Internal Networking: fix for processing promiscuous mode requests by VMs, defaulting to switch behaviour
Host-Only Networking: fixed connectivity issue after resuming the host from sleep (bug #3625)
Bridged Networking: support for interface bonding on Mac OS X hosts (bug #8731)
NAT: fixed processing of ARP announcements for guests with static assigned IPs (bug #8609)
VRDP: backward compatibility with VRDPAuth external authentication library (bug #8063)
Shared Folders: don't fail to start a VM if a path is not absolute, for example when importing an OVF from a different host (bug #7941)
Audio: fixed crash under certain conditions (bug #8527)
USB: fixed a crash when plugging certain USB devices (bug #8699)
HPET: fixed time jumps when reading the counter (bug #8707)
OVF/OVA: automatically adjust disk paths if the VM name is changed on import
OVF/OVA: fix export to slow medias
OVF/OVA: automatically repair inconsistent appliances with multiple disks (bug #8253)
rdesktop-vrdp: fixed an assertion triggered under certain conditions (bug #8593)
Windows hosts: fixed occasional hangs during VM shutdown because sometimes COM was not properly uninitialized
Mac OS X hosts: prevent the mouse from leaving the VM window while captured
Mac OS X hosts: keep aspect ratio while resizing in scale mode (shift for old behaviour) (part of bug #7822)
X11 hosts: fixed Yen key support (bug #8438)
X11 hosts: fixed a regression which caused Host+F1 to pop up help instead of sending Ctrl+Alt+F1
Linux hosts / Linux Additions: mangle IPRT symbols to allow installing VirtualBox inside a VM while the Guest Additions are active (bug #5686)
Linux hosts / Linux guests: workaround for a bug in GLIBC older than version 1.11 leading to crashes under certain conditions (signed/unsigned problem with memchr on 64-bit machines)
Solaris hosts: fixed a deadlock in event semaphores that could lead to unkillable VM processes
Windows Additions: fixed Sysprep parameter handling
Windows Additions: fixed spontaneous guest reboots under certain circumstances (4.0.2 regression; bugs #8406, #8429)
Windows Additions: added auto logon support for locked workstations on legacy Windows versions
Windows Additions: fixed driver bugcheck error when handling PnP messages (4.0 regression; bug #8367)
Windows Additions: fixed memory leak in VBoxVideo
X11 Additions: added support for X.Org Server 1.10 final
Linux Additions: Linux kernel 2.6.39-rc1 fixes
Linux Additions: improved auto-run support (bug #5509)
Linux Additions: fix mouse support on SUSE 11 SP 1 guests (bug #7946)
Solaris Additions: added support for X.Org Server 1.9
Guest Additions: various bugfixes for guest control execution
Webservice: use own log file, with log rotation to limit size

Changes for v4.0.2 - v4.0.4

This is a maintenance release. The following items were fixed and/or added:
VMM: fixed recompiler crashes under certain conditions (bugs #8255, #8319 and further)
VMM: fixed running 64-bit guests on 32-bit host with nested paging enabled on AMD CPUs (4.0 regression; bug #7938)
VMM: fixed timing issues / hangs for certain guests using the programmable interval timer (bugs #8033 and #8062)
VMM: large page and monitoring fixes for live snapshots (bugs #7910, #8059, #8125)
GUI: fixed error message when trying to exceed the maximum number of host network interfaces
GUI: fixed saving of changes to the metadata of an existing snapshot (bug #8145)
GUI: fixed rare crash on X11 hosts (bug #8131)
GUI: when selecting a shared folder, start the file dialog in the users home directory (bug #8017)
ExtPack: enforce the correct permissions which might be restricted by umask when creating directories (non-Windows hosts only; bug #7878)
VBoxSDL: fixed crash when starting by specifying the VM UUID (4.0 regression; bug #8342)
VBoxManage: allow savestate even if the VM is already paused
VBoxManage: fixed modifyvm --synthcpu (bug #6577)
VBoxManage: fixed hang when doing guestcontrol execute –wait-for exit and displaying process status on exit (bug #8235)
VBoxManage: decreased CPU load during guestcontrol execute –wait-for exit/stdout while waiting for the guest process to terminate (bug #7872)
VBoxManage: fixed list hostdvds/host?oppies
VBoxManage: fixed storageattach for host DVD drives and host ?oppy drives
Metrics: introduced RAM/VMM base metric.
Main: improved sanity check when taking a VM screen shot (bug #7966)
Main: fixed a crash under rare circumstances if a VM failed to start
Main: fixed attaching of immutable disk images (bug #8105)
Main: fixed a crash at VM shutdown (bug #6443)
Main: fixed incorrect handling of cross-referenced medium attachments (bug #8129)
Settings: fixed truncating of big integer values (4.0 regression)
Settings: properly store the ICH9 chipset type (bug #8123)
Host-Only & Bridged Networking: fixed VBox DHCP server startup issue for Windows hosts (4.0 regression; bug #7905)
Host-Only Networking: re-create vboxnetX interfaces after vboxnetadp.ko module reload on Linux and Darwin (bugs #5934, #6341)
NAT: fixed an mbuf leak under rare circumstances (bug #7459)
ACPI: don’t allow the guest to enter S4 by default and don’t announce S1 and S4 in the ACPI tables if disabled (bug #8008)
Graphics card: made re-enabling disabled screens work correctly to prevent problems when X11 guests enter screen saving mode (bug #8122)
Storage: fixed write errors with snapshots if the host cache is disabled (4.0 regression; bug #8221)
ATA/SATA: fixed reset handling after ACPI suspend/resume
BusLogic: fixed hang with SMP VMs
Serial: another attempt to prevent lost characters during transmission (bug #1548)
Linux hosts/guests: Linux 2.6.38-rc1 compile fixes
Mac OS X hosts: fixed VBoxSVC crash when listing host interfaces without default gateway (64-bit hosts only; bug #7955)
Solaris/Darwin hosts: fixed VM CPU execution cap
X.Org guests: fixed a crash on X server restart (bug #8231)
X.Org guests: support X.Org Server 1.10 pre-release and Ubuntu 11.04 Alpha.
X.Org guests: Add EDID emulation in the graphics driver to prevent GNOME settings daemon changing the mode on login.
X.Org guests: never send graphics modes to the host that older VirtualBox versions can’t handle.
Linux Additions: fixed a memory leak in the shared folders code if a host link is not readable (bug #8185)
Windows Additions: fixed handling of Security Attention Sequence (SAS) with VBoxGINA

Changes for v4.0 - v4.0.2

GUI: don't crash if a removable host drive referenced from the VM settings vanished
GUI: fixed a crash when using the KDE4 Oxygen theme and clicked on the settings button (4.0 regression; bug #7875)
GUI: properly warn if the machine folder cannot be created (bug #8031)
GUI: several fixes for multimonitor X11 guests
ExtPack: don’t make the installer helper application suid root (Linux .deb/.rpm packages only)
ExtPack: improved user experience on Vista / Windows 7 when installing an extension pack
ExtPack: fixed issue with non-ascii characters in the path name during installing an extension pack (bug #7917)
ExtPack: fixed SELinux issues on 32-bit Linux hosts
VBoxManage: Host-only interface creation and removal is now supported for all platforms except Solaris (bug #7741)
VBoxManage: fixed segmentation fault when removing non-existent host-only interface
Storage: fixed possible crashes with VMDK/VHD images with snapshots and async I/O (4.0 regression)
Storage: don’t eject the physical medium if a DVD/CDROM/ﬂoppy drive is detached from a VM (bug #5825)
Storage: be more robust when a faulty guest sends ATA commands to an ATAPI device (bug #6597)
Parallels: fixed deletion of the image during suspend, pause or power off (4.0 regression)
Bridged networking: fixed host kernel panic when bridging to devices with no TX queue (4.0 regression; Linux hosts only; bug #7908)
NAT: port-forwarding rule registration respects protocol parameter (bug #8094)
E1000: fixed PXE boot issues with WDS (bug #6330)
Virtio-net: fixed the issue with TX performance in some Linux guests
ICH9: fixed VM crash (software virtualization only; bug #7885)
VGA: fixed VESA screen issue (4.0 regression; bug #7986)
Shared Folders: fixed parameter parsing when creating symbolic links, fixes 32-bit/64-bit bitness issue (bug #818)
Main: fixed crash under rare circumstances due to an invalid logging string (4.0 regression)
Main: improve error information propagation for errors preventing a VM start
Main: fixed problems with snapshots and non-ASCII characters in machine paths (bug #8024)
Webservice: now listens to localhost by default as documented (bug #6067)
Settings: do not fail loading machine settings if removeable drive attachment (host drive or image) cannot be found; with 4.0 this is much more likely when machines are moved from one host to another
Settings: fixed issue that changing a snapshot name or description was not saved to machine XML
OVF/OVA: fixed import of files created by other OVF tools (bug #7983)
rdesktop-vrdp: fix a crash during USB device enumeration (bug #7981)
Linux hosts: fixed a crash during USB device enumeration.
Linux hosts: try a bit harder to allocate memory (bug #8035; 4.0 regression)
Guest Additions: fixed parsing of parameters for guest control in VBoxService (4.0 regression; bug #8010)
Windows Guest Additions: automatic logon on Windows Vista/Windows 7 now supports unlocking previously locked workstations

Changes for v3.2.12 - v4.0

This version is a major update. The following major new features were added:
Reorganization of VirtualBox into a base package and Extension Packs; see chapter 1.5, Installing VirtualBox and extension packs, see the manual for more information
New settings/disk file layout for VM portability; see chapter 10.1, Where VirtualBox stores its files, see the manual for more information
Major rework of the GUI (now called “VirtualBox Manager”):
Redesigned user interface with guest window preview (also for screenshots)
New “scale” display mode with scaled guest display; see chapter 1.8.5, Resizing the machine’s window, see the manual for more information
Support for creating and starting .vbox desktop shortcuts (bug #1889)
The VM list is now sortable
Machines can now be deleted easily without a trace including snapshots and saved states, and optionally including attached disk images (bug #5511; also, VBoxManage unregistervm --delete can do the same now)
Built-in creation of desktop file shortcuts to start VMs on double click (bug #2322)
VMM: support more than 1.5/2 GB guest RAM on 32-bit hosts
New virtual hardware:
Intel ICH9 chipset with three PCI buses, PCI Express and Message Signaled Interrupts (MSI); see chapter 3.4.1, “Motherboard” tab, see the manual for more information
Intel HD Audio, for better support of modern guest operating systems (e.g. 64-bit Windows; bug #2785)
Improvements to OVF support (see chapter 1.12, Importing and exporting virtual machines, see the manual for more information):
Open Virtualization Format Archive (OVA) support
Significant performance improvements during export and import
Creation of the manifest file on export is optional now
Imported disks can have formats other than VMDK
Resource control: added support for limiting a VM’s CPU time and IO bandwidth; see chapter 5.8, Limiting bandwidth for disk images, see the manual for more information
Storage: support asynchronous I/O for iSCSI, VMDK, VHD and Parallels images
Storage: support for resizing VDI and VHD images; see chapter 8.21, VBoxManage modifyhd, see the manual for more information.
Guest Additions: support for multiple virtual screens in Linux and Solaris guests using X.Org server 1.3 and later
Language bindings: uniform Java bindings for both local (COM/XPCOM) and remote (SOAP) invocation APIs
In addition, the following items were fixed and/or added:
VMM: Enable large page support by default on 64-bit hosts (applies to nested paging only)
VMM: fixed guru meditation when running Minix (VT-x only; bug #6557)
VMM: fixed crash under certain circumstances (Linux hosts only, non VT-x/AMD-V mode only; bugs #4529 and #7819)
GUI: add configuration dialog for port forwarding in NAT mode (bug #1657)
GUI: show the guest window content on save and restore
GUI: certain GUI warnings don’t stop the VM output anymore
GUI: fixed black fullscreen minitoolbar on KDE4 hosts (Linux hosts only; bug #5449)
BIOS: implemented multi-sector reading to speed up booting of certain guests (e.g. Solaris)
Bridged networking: improved throughput by filtering out outgoing packets intended for the host before they reach the physical network (Linux hosts only; bug #7792)
3D support: allow use of CR_SYSTEM_GL_PATH again (bug #6864)
3D support: fixed various clipping/visibility issues (bugs #5659, #5794, #5848, #6018, #6187, #6570)
3D support: guest application stack corruption when using glGetVertexAttrib[ifd]v (bug #7395)
3D support: fixed OpenGL support for libMesa 7.9
3D support: fixed Unity/Compiz crashes on natty
2D Video acceleration: multimonitor support
VRDP: fixed rare crash in multimonitor configuration
VRDP: support for upstream audio
Display: fixed occasional guest resize crash
NAT: port forwarding rules can be applied at runtime
SATA: allow to attach CD/DVD-ROM drives including passthrough (bug #7058)
Floppy: support readonly image files, taking this as the criteria for making the medium readonly (bug #5651)
Audio: fixed memory corruption during playback under rare circumstances
Audio: the DirectSound backend now allows VMs to be audible when another DirectSound application is active, including another VM (bug #5578)
EFI: support for SATA disks and CDROMs
BIOS: reduce the stack usage of the VESA BIOS function #4F01 (Quake fix)
OVF/OVA: fixed export of VMs with iSCSI disks
Storage: Apple DMG image support for the virtual CD/DVD (bug #6760)
Linux host USB support: introduced a less invasive way of accessing raw USB devices (bugs #1093, #5345, #7759)
Linux hosts: support recent Linux kernels with CONFIG_DEBUG_SET_MODULE_RONX set
Guest Additions: Shared Folders now can be marked as being auto-mounted on Windows, Linux and Solaris guests
Linux Additions: Shared Folders now support symbolic links (bug #818)
Linux Additions: combined 32-bit and 64-bit additions into one file
Windows Additions: automatic logon on Windows Vista/Windows 7 is now able to handle renamed user accounts; added various bugfixes

Changes for v3.2.10 - v3.2.12

VMM: fixed rare host crash when running 64-bit guests on 32-bit hosts (bug #7577)
VMM: fixed host reboots under rare circumstances due to NMIs triggered by active performance counters (Linux hosts in non-VT-x/AMD-V mode only; bug #4529)
VMM: fixed out of memory guru meditation for large memory guests (bug #7586)
VMM: fixed a guru meditation related to large pages
VMM: use new VT-x feature to keep the guest from hogging the CPU
Snapshots: implemented deleting the last remaining snapshot while the VM is running
GUI: perform the checks for exceeding the size limit of the host file system and for broken asynchronous I/O on older Linux kernels with ext4 / xfs file systems not only when starting the VM from scratch but also when starting from a saved state
NAT: fixed memory leak (3.2.0 regression; bugs #6918, #7353)
Networking: fixed VM reset handling in e1000
VRDP: fixed rare crash in multimonitor configuration
Display: fixed occasional guest resize crash
Mouse: don't send relative mouse events together with absolute mouse events (3.2.10 regression; bug #7571)
Keyboard: fixes for the USB keyboard emulation; fixes for Koran keyboards
Serial: don't hang if the host device would block during open (bugs #5756, #5380)
Serial: fixed modem status lines (Linux hosts only; bug #812)
Graphics: Horizontal resolutions are no longer restricted to a multiple of 8 pixels (bug #2047; requires Guest Additions update).
USB: fixed a crash with older Linux kernels and non-ASCII characters in device strings (Linux hosts only; bug #6983, #7158, #7733; version 3.2.8 contained an incomplete fix)
USB: fixed a crash under rare circumstances (bug #7409; Windows hosts only)
iSCSI: respond to NOP-In requests from the target immediately to avoid being disconnected if the guest is idle
3D support: fixed a crash under certain circumstances (bug #7659)
3D support: fixed crashes for GLUT based apps (bug #6848)
3D support: added missing GLX 1.3 functionality (bugs #7652, #7195)
2D Video acceleration: fixed potential deadlock when saving the VM state (bug #4124)
Windows hosts: another fix for BSODs under certain circumstances in VBoxNetFlt.sys (bug #7601)
Solaris hosts: fixed host USB DVD drive detection
Mac OS X hosts: fixed swapped keys for certain ISO keyboard types (bug #2996)
Linux hosts: added link state handling for TAP devices needed for proper operation with bridged networking on kernels 2.6.36 and above (bug #7649)
Linux hosts/guests: Linux 2.6.37 fixes
Linux Additions: properly compile the vboxvideo module if DKMS is not installed (bug #7572)
Linux Additions: fixed a memory leak when accessing non-existing files on a Shared Folders (bug #7705)
Windows Additions: skip none-mapped user accounts when enumerating user accounts for VM information

Changes for v3.2.8 - v3.2.10

VMM: V8086 mode fix for legacy DOS/Windows guests with EMM386 (3.2.8 regression)
VMM: stability fix (bug #7342)
VMM: fixed a Guru meditation related to large pages (bug #7300)
VMM: fixed support for large pages on Linux hosts
VMM: fixed a Guru meditation for large memory 64-bit guests on 32-bit hosts with nested paging (bug #7544
VMM: performance improvements for VMs with more than 2 GB RAM (bug #6928)
GUI: fixed host key handling if the host key is set to Left Alt (Linux/Solaris hosts only; 3.2.0 regression; bug #6758)
GUI: the VM can be minimized from the mini toolbar (bug #4952)
GUI: handle Ctrl+Break properly on X11 hosts (3.2.0 regression; bug #6122)
GUI: fixed the case where the user aborted the media selector for selecting the boot hard disk from the VM wizard
GUI: added a check for Linux kernels 2.6.36 or later which are known to have the asynchronous I/O bug on ext4 / xfs file systems fixed (Linux hosts only)
OpenSolaris guests: use SATA controller by default
Storage: fixed I/O errors in the guest after compacting VDI images (3.2.6 regression; bug #7294)
Storage: automatically repair base disk images with non-zero parent UUID which made them inaccessible (bug #7289)
Storage: fixed corrupted images if a merge operation was canceled
IDE: added ATAPI passthrough support for audio CDs (bug #3494)
SATA: fixed a potential hang during boot of recent Solaris guests
SATA: handle out of disk space and similar conditions better
iSCSI: fixed sporadic hangs when closing the connection
VGA: fixed missing redraw with multiple screens under certain circumstances (bug #7291)
VGA: serveral small fixes for legacy VGA graphics modes
Bridged networking: fixed occasional host freeze during VM shutdown (Linux hosts only)
NAT: don't check for the existence of the TFTP prefix when delivering a file via bootp (bug #7384)
NAT: fixed resolving of names at the host resolver (bug #7138)
NAT: under rare conditions the NAT engine consumed 100% CPU load (non-Windows hosts only)
VRDP: fixed memory leak under certain circumstances (bug #5966)
VRDP: fixed missing redraws with Windows guests under certain circumstances
USB: properly discard blocking outstanding bulk URBs, fixes some printers
USB: Blackberry fix (bug #6465)
VBoxHeadless: fixed event queue processing problems which led to hangs if the VM could not be started successfully
VBoxManage: don't crash if parameters with invalid characters are passed (bug #7388)
VBoxManage: clonehd: fixed a bug where the command aborted with an error message under rare circumstances
VBoxManage: metrics: made it work for directly started VMs again (3.2.8 regression; bug #7482)
3D support: report GLX_ARB_get_proc_address as supported extension
3D support: guest application stack corruption when using glGetVertexAttrib[ifd]v (bug #7395)
3D support: fixed broken 3D support when switching to fullscreen/seamless modes (bug #7314)
3D support: fixed 32bit OpenGL apps under 64bit Windows XP/Vista (bug #7066)
OVF: fixed bug when exporting a VM with multiple attached disks (bug #7366)
OVF: fixed slow export for certain filesystems (bug #3719)
OVF: disabled manifest (.mf file) support; manifests are no longer verified on import nor written on export
Shared clipboard/Windows: improved the reliability of the shared clipboard on Windows hosts and guest (partial fix to bug #5266)
Shared Folders: don't show an empty directory if filenames with an invalid encoding exist on the host (bug #7349)
Shared Folders: return the proper error code when trying to list files for a non-existing wildcard (bug #7004)
Audio: fixed guest memory corruption when capturing from the NULL audio backend (bug #6911)
Audio: improved playback quality (less choppy) (bug #6816)
Web service: avoid unnecessary creation of idle threads
Additions: fixed bug in the guest execution feature when passing more than one environment variable
Additions: refresh all guest properties written by VBoxService after the VM was restored from a saved state
Additions: fixed a division by zero crash of VBoxService under certain circumstances
Additions: immediately resynchronize the guest time with the host time after the VM was restored from a saved state (bug #4018)
Additions/Windows: fixed LsaEnumerate error when enumerating logged in users
Additions/X.Org: support X.Org Server 1.9 (bug #7306)
Additions/X.Org: don't crash VBoxClient during reboot
Solaris hosts: fixed host DVD drive enumeration on Solaris 10
Solaris hosts: added a custom core dumper to procure more data in the event of a VM crash
Solaris guests: fixed user idle detection
Solaris guests: fixed a possible panic in Shared Folders when using the wrong user or group IDs (bug #7295)
Solaris guests: fixed Shared Folders from truncating files to 2GB on 32-bit guests (bug #7324)
Windows hosts: fixed a BSOD under certain circumstances in VBoxNetFlt.sys (bug #7448)
Linux hosts/guests: Linux 2.6.36 fixes
Linux hosts/guests: DKMS fixes (bug #5817)
Mac OS X hosts: fixed missing dock menu entries (bug #7392)

Changes for v3.2.4 - v3.2.6

VMM: fixed host crash when running 64-bit guests on 32-bit hosts with certain Intel CPUs (VT-x only; bug #6166)
VMM: allow 64-bit SMP guests on 32-bit hosts (VT-x and AMD-V only; does not apply to Mac OS X, which already supports it)
VMM: fixed Guru mediation if guests with more than 2GB are booted with VT-x/AMD-V disabled (bug #5740)
VMM: fixed TR limit trashing (VT-x and 64-bit host only; bug #7052)
Page Fusion: several bug fixes for SMP guests (including bug #6964)
Teleportation: several fixes and improvements
Mac OS X server guests: compatibility fix
EFI: fixed memory detection for guests with 2GB or more RAM assigned
GUI: added a workaround for a Linux kernel bug which affecting asynchronous I/O on ext4 / xfs file systems (Linux hosts only)
GUI: added setting for multiple VRDP connections; useful if multiple screens are enabled
GUI: another fix for the keyboard capturing bug under metacity (bug #6727)
GUI: fixed quit dialog when used in seamless or fullscreen mode (Mac OS X hosts only; bug #6938)
GUI: handle the extra key on the Brazilian keyboard on X11 hosts again (bug #7022).
2D Video acceleration: fixed crashes when leaving the fullscreen mode (bug #6768)
VBoxManage: fixed storageattach error handling (bug #6927)
VBoxManage: fixed dhcpserver add (3.2.0 regression; bug #7031)
Storage: fixed hang with images located on filesystems which don't support async I/O (bug #6905)
Storage: fixed raw disks on Windows hosts (3.2.0 regression; bug #6987)
LsiLogic: fixed hang with older Linux guests
BusLogic: fixed hang during I/O
SATA: set initial number of ports to 1 as some guests can't handle 30 ports (e.g. CentOS 4 and FreeBSD; bug #6984)
SATA: performance improvement
SCSI: fixed error when using the full format option during Windows installation (bug #5101)
iSCSI: fixed authentication (bug #4031)
Host-only/bridged networking: fixed excessive host kernel warnings under certain circumstances (Linux hosts only; 3.2.0 regression; bug #6872)
NAT: fixed potential memory leaks
NAT: increased the size of the memory pool for 16K Jumbo frames (performance tweak)
NAT: allow to link/unlink the network cable even if the VM is currently paused
E1000: disconnect cable was not properly handled if the NIC was not yet initialized by the guest
OVF: export performance optimization
OVF: upgraded OS type definitions to CIM 2.25.0 so that Windows 7 and other OSes are now tagged correctly on export
Settings: the setting for disabling the host I/O cache was sometimes not properly saved
Settings: save machine state into XML correctly even when snapshot folder has been changed to a non-default location (bug #5656)
USB: allow the guest to disable an EHCI port
USB: find a valid language ID before querying strings (bug #7034)
POSIX hosts: fixed several memory leaks (3.2.0 regression)
Solaris hosts: fixed VDI access problem under certain circumstances (IDE/SATA; 3.2.0 regression)
Solaris hosts: fixed VM fails to start on 32-bit hosts (3.2.0 regression; bug #6899)
Windows hosts (32-bit): increase guest RAM limit if the host kernel allows for more virtual address space
Linux Additions: re-read a directory after a file was removed (bug #5251)
Linux Additions: install the DRI driver in the right location on ArchLinux guests (bug #6937)
X11 Additions: fixed spurious mouse movement events (bug #4260)
Solaris Additions: fixed guest control execution
Windows Additions: automatic logon on Windows Vista/Windows 7 is now able to handle renamed and principal user accounts; added various bugfixes
Windows Additions: improved command line parsing of the installer
Windows Additions: fixed driver verifier bugcheck in VBoxMouse (bug #6453)
3D support: fixed OpenGL support for 32bit apps under 64bit Windows guests

Changes for v3.2.2 - v3.2.4

GUI: fixed a superfluous resize-event on powering-on VM for X11 (improvement for the 3.2.2 fix)
Host-only/bridged networking: fixed guest-to-guest communication over wireless (3.2.0 regression; bug #6855)
Storage: fixed a potential guest disk corruption with growing images (3.2.0 regression)
Page Fusion: fixed shared module detection for Win64 guests
3D support: allow use of CR_SYSTEM_GL_PATH again (bug #6864)
3D support: fixed a host assertion for some multi-threaded guest applications (bug #5236)
3D support: fixed host crashes with nVIDIA drivers on WDDM startup
OVF: fixed import of OVFs with a VM description (annotation) (3.2.2 regression; bug #6914)
VRDP: fixed issues with secondary monitors (bug #6759)

Changes for v3.1.6 - v3.1.8

This is a maintenance release. The following items were fixed and/or added:
VMM: fixed crash with the OpenSUSE 11.3 milestone kernel during early boot (software virtualization only; bug #5457)
VMM: fixed invalid state during teleportation
VMM: fixed OS/2 guest crash with nested paging enabled
VMM: fixed massive display performance loss (AMD-V with nested paging only)
GUI: fixed off-by-one bug when passing absolute mouse coordinates to the guest (3.1.6 regression)
GUI: show the real version of the Guest Additions, not the interface version
GUI: when adding a DVD or floppy slot in the VM mass storage settings dialog, don't attach a random medium but just leave the slot empty
GUI: added --seamless and --fullscreen command line switches (bug #4220)
GUI: fixed a SEGFAULT under rare circumstances
2D Video acceleration: fixed display issues when working with non 32-bit modes (bugs #6094 & #6208)
LsiLogic: Fixed detection of hard disks attached to port 0 when using the drivers from LSI
ATA: Fixed sporadic crash with Linux guests when having a hard disk and DVD drive on the same channel (bug #6079)
Network: allow to start a VM even if not all network adapters are attached
Network: promiscuous mode support for e1000 and simparavirtualized adapters (bug #6519)
NAT: fixed ICMP latency (non-Windows hosts only; bug #6427)
SCSI: fixed guest crashes under certain circumstances when booting from SCSI devices
VBoxManage: fixed modifyvm --natnet default
Solaris Hosts: fixed a kernel panic when bridged networking might fail to initialize
Solaris Hosts: fixed priority tagged VLAN packets in bridged networking
Shared folders: fixed issue with copying read-only files (Linux guests only; bug #4890)
Shared folders: renamed the guest kernel module from vboxvfs to vboxsf to make it load on demand by the Linux kernel. Fixes mounting from /etc/fstab in Ubuntu 10.04
Shared folders: fixed setuid file permissions (Solaris guests only).
Shared folders: fixed deleting directories recursively (Solaris guests only; bug #6513)
Guest Additions: support seamless and dynamic resizing on certain older X11 guests (bug #5840)
Solaris Additions: fixed OpenGL library dependencies (bug #6435)
Keyboard/Mouse emulation: fixed handling of simultaneous mouse/keyboard events under certain circumstances (bug #5375)
Mouse emulation: never switch straight back from Explorer to IntelliMouse mode as it confuses the FreeBSD mouse driver (bug #6488)
SDK: fixed memory leak in IDisplay::takeScreenShotSlow() (bug #6549)
3D support: fixed Final frame of Compiz animation not updated to the screen (Mac OS X only) (bug #4653)
VRDP: allow to bind to localhost only on Mac OS X (bug #5227)
Linux hosts: add host USB support for Ubuntu 10.04 and other hosts without the hal daemon or usbfs (bug #6343)
webservice: more structs and array fixes in PHP bindings (bug #5657)
Windows hosts: make the bridged networking driver notify dll be correctly unregistred on uninstall (bug #5780)

Changes for v3.1.2 - v3.1.4

VMM: SMP stability fixes
VMM: fixed guru meditation in certain rare cases (bug #5968)
VMM: activate NXE for PAE enabled guests (VT-x and AMD-V on 32 bits hosts only; bug #3578)
VMM: added workaround for broken BIOSes that make VirtualBox think AMD-V is in use (for details see bug #5639)
VMM: fixed rare host reboot when restoring a saved state (bug #3945)
VMM: fixed incompatibility with 2.6.32 Linux kernels (software virtualization only; bug #6100)
VMM: turn on nested paging by default for new VMs (if available; VT-x and AMD-V only)
VMM: turn on VPID by default for new VMs (if available; VT-x only)
VMM: perform strict CPUID compatibility checks when teleporting; to get the old behavior set "VBoxInternal/CPUM/StrictCpuIdChecks" to 0
VMM: fixed VM crash with certain 16 bits Windows applications (software virtualization only; bug #5399)
Snapshots: fixed a 3.1 regression that broke deletion of snapshots when a machine had immutable or writethrough storage attached (bug #5727)
Saved state: fixed VERR_SSM_LOADED_TOO_MUCH error when loading DisplayScreenshot(bug #6162)
VBoxManage: add restorecurrent operation to snapshots command
VBoxManage: fixed broken snapshot lookup by name (bug #6070
GUI: fixed the broken "Reload" button that reloads the machine XML when a machine is inaccessible
GUI: fixed guest fullscreen mode after reboot (bug #5372)
GUI: handle Ctrl+Break properly on X11 hosts (bug #6122)
GUI: fixed status LEDs for storage devices
GUI: workaround for disabling the seamless mode on KDE hosts (KWin bug)
3D support: fixed SELinux warning saying VBoxOGL.so requires text relocation (bug #5690)
3D support: fixed Corrupted surface rendering (bug #5695)
3D support: free textures on guest application termination (bug #5206)
3D support: fixed ubigraph_server crashes (#4674)
3D support: fixes for 64-bit Solaris guests
Seamless: disable seamless mode when guest changes screen resolution (bug #5655)
NAT: fixed high CPU load under certain circumstances (Windows hosts only; bug #5787)
NAT: fixed handling of the broadcast flag in DHCP requests
NAT: fixed rare crash due to an assertion in the ICMP code (bug #3217)
Virtio-net: don't crash when ports accessed beyond the valid range (bug #5923)
LsiLogic: fix for Windows 7 guests
ATA: fix for guru meditation when installing Solaris 8 guests (bug #5972)
VHD: fixed an incompatibility with Virtual PC (bug #5990)
VHD: update the footer backup after setting a new UUID (bug #5004)
Host DVD: really fixed loading "passthrough" setting from config file (bug #5681)
Shared folders: fixed resolving of symlink target on Linux (3.1.2 regression)
VRDP: fixed VERR_NET_ADDRESS_IN_USE error when restarting a VM (3.1 regression; bug #5902)
VRDP: fixed crash on Mac OS X when 3D is enabled (3.1 regression)
PulseAudio: fixed recording (bug #4302)
USB: fixed a shutdown blue screen (Windows hosts only; bug #5885)
BIOS: fixed attribute during text scroll (bug #3407)
OVF: fix strange error messages on disk import errors
OVF: do not require write access the the .ovf file during import (3.1 regression; bug #5762)
iSCSI: fix taking snapshots of a running VM (#5849)
Solaris hosts: several USB fixes (including support for Apple iPod; bug #5873)
Solaris installer: fixed USB module removal and Solaris 10 "id" binary incompatibility
Guest Additions: fixed wrong guest time adjustment if the guest clock is ahead (3.1 regression; non-Windows guests only)
Linux Additions: fixed shared folders for Linux 2.6.32 guests (bug #5891)
Linux Additions: make the mouse driver work on Debian 5.0.3 guests again (3.1.2 regression, bug #5832)
Windows Additions: fixed malfunctioning !VBoxService that broke time-sync (bug #5872)
Windows Additions: fixed uninstallation issues on 64-bit guests
Windows Additions: fixed some sysprep execution issues
X.Org Additions: never reject the saved video mode as invalid (bug #5731)
XFree86 Additions: accept video mode hints for the initial mode again

Changes for v3.1.0 - v3.1.2

VMM: fixed SMP stability regression
USB: fixed USB related host crashes on 64 bits Windows hosts (#5237)
Main: wrong default HWVirtExExclusive value for new VMs (bug #5664)
Main: DVD passthrough setting was lost (bug #5681)
VBoxManage: iSCSI disks do not support adding a comment (bug #4460)
VBoxManage: added missing --cpus and --memory options to OVF --import
GUI: fixed VBox URL in update dialog for German and Dutch languages
GUI: NLS updates
OVF: fixed export of non standard storage controller names (bug #5643)
Solaris hosts: several USB fixes (including support for Apple iPhone)
Mac OS X hosts: several fixes for the 3D support
Mac OS X hosts: re-enabled CMD+Key combinations, even if the Host-Key isn't CMD (bug #5684)
Mac OS X hosts: fixed to fast scrolling if the mouse wheel is used inside the guest (bug #5672)
Mac OS X hosts: dock & menubar don't disappear in fullscreen when the VM is not running on the primary display (bug #1762)
Mac OS X hosts: added an option for enabling "Auto show Dock & Menubar in fullscreen" (bug #5636)
Windows host installer: fixed starting VBox with wrong privileges right after installation (bug #4162)
Host interface and host-only networking: prevent driver from unloading while a VM is still active (Windows host only)
Host-only networking: fixed host-only interface creation (Windows host only) (bug #5708)
Virtio-net: don't crash without an attached network
Virtio-net: fixed the issue with intermittent network in VM with several virtual CPU cores.
NAT: fixed port-forwarding regressions (bug #5666)
NAT: fixed crash under certain conditions (bug #5427)
NAT: fixed resolving of names containing a slash or underscore when using the host resolver DNS proxy (bug #5698)
ATA: fixed sporadic crash when resuming after a VM was forcefully paused (e.g. due to iSCSI target being unavailable)
SATA: fixed raw vmdk disks (bug #5724)
Linux guests: increased the default memory for Redhat and Fedora guests
Linux Guest Additions: fixed installation on RHEL 3.9 guests and on some 64bit guests
Linux Guest Additions: prevent SELinux warnings concerning text relocations in VBoxOGL.so (bug #5690)
X11 guests: fixed mouse support for some Xorg 1.4 guests (openSUSE 11.0)
X11 guests: fixed xorg.conf modification for some older Xorg releases (openSUSE 11.1)
Windows guests: fixed some VBoxService shutdown issues
Windows guests: fixed VBoxVideo spinlock issues on NT4
Windows Guest Additions: fixed uninstallation issues of NT4
Shared folders: fixed resolving of symlink target (bug #5631)
2D Video acceleration: delay loading of OpenGL dlls for Windows hosts to avoid GUI crashes on misconfigured systems
2D Video acceleration: fixed issues with video picture not displayed on playback

Changes for v3.0.0 - v3.1.0

This version is a major update. The following major new features were added:
Teleportation (aka live migration); migrate a live VM session from one host to another (see the manual for more information)
VM states can now be restored from arbitrary snapshots instead of only the last one, and new snapshots can be taken from other snapshots as well ("branched snapshots"; see the manual for more information)
2D video acceleration for Windows guests; use the host video hardware for overlay stretching and color conversion (see the manual for more information)
More flexible storage attachments: CD/DVD drives can be attached to an arbitrary IDE controller, and there can be more than one such drive (the manual for more information)
The network attachment type can be changed while a VM is running
Complete rewrite of experimental USB support for OpenSolaris hosts making use of the latest USB enhancements in Solaris Nevada 124 and higher
Significant performance improvements for PAE and AMD64 guests (VT-x and AMD-V only; normal (non-nested) paging)
Experimental support for EFI (Extensible Firmware Interface; see the manual for more information)
Support for paravirtualized network adapters (virtio-net; see the manual for more information)
In addition, the following items were fixed and/or added:
VMM: guest SMP fixes for certain rare cases
GUI: snapshots include a screenshot
GUI: locked storage media can be unmounted by force
GUI: the a log window grabbed all key events from other GUI windows (bug #5291)
GUI: allow to disable USB filters (bug #5426)
GUI: improved memory slider in the VM settings
GUI: the VirtualBox website couldn't be opened from the help menu (bug #4559)
3D support: major performance improvement in VBO processing
3D support: added GL_EXT_framebuffer_object, GL_EXT_compiled_vertex_array support
3D support: fixed crashes in FarCry, SecondLife, Call of Duty, Unreal Tournament, Eve Online (bugs #2801, #2791)
3D support: fixed graphics corruption in World of Warcraft (#2816)
3D support: fixed Final frame of Compiz animation not updated to the screen (#4653)
3D support: fixed incorrect rendering of non ARGB textures under compiz
iSCSI: support iSCSI targets with more than 2TiB capacity
VRDP: fixed occasional VRDP server crash (bug #5424)
Network: fixed the E1000 emulation for QNX (and probably other) guests (bug #3206)
NAT: added host resolver DNS proxy (see the manual for more information)
VMDK: fixed incorrectly rejected big images split into 2G pieces (bug #5523, #2787)
VMDK: fixed compatibility issue with fixed or raw disk VMDK files (bug #2723)
VHD: fixed incompatibility with Hyper-V
Support for Parallels version 2 disk image (HDD) files; see the manual for more information
OVF: create manifest files on export and verify the content of an optional manifest file on import
OVF: fixed memory setting during import (bug #4188)
Mouse device: now five buttons are passed to the guest (bug #3773)
VBoxHeadless: fixed loss of saved state when VM fails to start
VBoxSDL: fixed crash during shutdown (Windows hosts only)
X11 based hosts: allow the user to specify their own scan code layout (bug #2302)
Mac OS X hosts: don't auto show the menu and dock in fullscreen (bug #4866)
Mac OS X hosts (64 bit): don't interpret mouse wheel events as left click (bug #5049)
Mac OS X hosts: fixed a VM abort during shutdown under certain conditions
Solaris hosts: combined the kernel interface package into the VirtualBox main package
Solaris hosts: support for OpenSolaris Boomer architecture (with OSS audio backend).
Shared folders: VBOXSVR is visible in Network folder (Windows guests, bug #4842)
Shared folders: performance improvements (Windows guests, bug #1728)
Windows, Linux and Solaris Additions: added balloon tip notifier if VirtualBox host version was updated and Additions are out of date
Solaris guests: fixed keyboard emulation (bug #1589)
Solaris Additions: fixed as_pagelock() failed errors affecting guest properties (bug #5337)
Windows Additions: added automatic logon support for Windows Vista and Windows 7
Windows Additions: improved file version lookup for guest OS information
Windows Additions: fixed runtime OS detection on Windows 7 for session information
Windows Additions: fixed crash in seamless mode (contributed by Huihong Luo)
Linux Additions: added support for uninstalling the Linux Guest Additions (bug #4039)
Linux guest shared folders: allow mounting a shared folder if a file of the same name as the folder exists in the current directory (bug #928)
SDK: added object-oriented web service bindings for PHP5

Changes for v3.0.10 - v3.0.12

VMM: reduced IO-APIC overhead for 32 bits Windows NT/2000/XP/2003 guests; requires 64 bits support (VT-x only; bug #4392)
VMM: fixed double timer interrupt delivery on old Linux kernels using IO-APIC (caused guest time to run at double speed; bug #3135)
VMM: reinitialize VT-x and AMD-V after host suspend or hibernate; some BIOSes forget this (Windows hosts only; bug #5421)
VMM: fix loading of saved state when RAM preallocation is enabled
BIOS: ignore unknown shutdown codes instead of causing a guru meditation (bug #5389)
GUI: never start a VM on a single click into the selector window (bug #2676)
Serial: reduce the probability of lost bytes if the host end is connected to a raw file
VMDK: fix handling of split image variants and fix a 3.0.10 regression (bug #5355)
VRDP: fixed occasional VRDP server crash
Network: even if the virtual network cable was disconnected, some guests were able to send / receive packets (E1000; bug #5366)
Network: even if the virtual network cable was disconnected, the PCNet card received some spurious packets which might confuse the guest (bug #4496)
Shared folders: fixed changing case of file names (bug #2520)
Windows Additions: fix crash in seamless mode (contributed by Huihong Luo)
Linux Additions: fix writing to files opened in O_APPEND mode (bug #3805)
Solaris Additions: fix regression in guest additions driver which among other things caused lost guest property updates and periodic error messages being written to the system log

Changes for v3.0.8 - v3.0.10

VMM: guest SMP stability fixes
VMM: fixed guru meditation with nested paging and SMP guests (bug #5222)
VMM: changed VT-x/AMD-V usage to detect other active hypervisors; necessary for e.g. Windows 7 XP compatibility mode (Windows & Mac OS X hosts only; bug #4239)
VMM: guru meditation during SCO OpenServer installation and reboot (VT-x only; bug #5164)
VMM: fixed accessed bit handling in certain cases (bug #5248)
VMM: fixed VPID flushing (VT-x only)
VMM: fixed broken nested paging for 64 bits guests on 32 bits hosts (AMD-V only; bug #5285)
VMM: fixed loading of old saved states/snapshots (bug #3984)
Mac OS X hosts: fixed memory leaks (bug #5084)
Mac OS X hosts (Snow Leopard): fixed redraw problem in a dual screen setup (bug #4942)
Windows hosts: installer updates for Windows 7
Solaris hosts: out of memory handled incorrectly (bug #5241)
Solaris hosts: the previous fix for #5077 broke the DVD host support on Solaris 10 (VBox 3.0.8 regression)
Linux hosts: fixed module compilation against Linux 2.6.32rc4 and later
Guest Additions: fixed possible guest OS kernel memory exhaustion
Guest Additions: fixed stability issues with SMP guests
Windows Additions: fixed color depth issue with low resolution hosts, netbooks, etc. (bug #4935)
Windows Additions: fixed NO_MORE_FILES error when saving to shared folders (bug #4106)
Windows Additions: fixed subdirectory creation on shared folders (bug #4299)
Linux Additions: sendfile() returned -EOVERFLOW when executed on a shared folder (bug #2921)
Linux Additions: fixed incorrect disk usage value (non-Windows hosts only)
Linux installer: register the module sources at DKMS even if the package provides proper modules for the current running kernel
3D support: removed invalid OpenGL assertion (bug #5158)
Network: fixed the Am79C973 PCNet emulation for QNX (and probably other) guests (bug #3206)
VMDK: fix handling of split image variants
VHD: do not delay updating the footer when expanding the image to prevent image inconsistency
USB: stability fix for some USB 2.0 devices
GUI: added a search index to the .chm help file
GUI/Windows hosts: fixed CapsLock handling on French keyboards (bug #2025)
Shared clipboard/X11 hosts: fixed a crash when clipboard initialisation failed (bug #4987)

Changes for v3.0.6 - v3.0.8

VMM: fixed 64 bits guest on 32 bits host regression in 3.0.6 (VT-x only; bug #4947)
VMM: fixed a recompiler triple fault guru meditation (VT-x & AMD-V only; bug #5058)
VMM: fixed hang after guest state restore (AMD-V, 32 bits Windows guest and IO-APIC enabled only; bug #5059)
VMM: fixed paging issue with OS/2 guests
VMM: fixed guru meditation in rare cases (2.0 regression; software virtualization only)
VMM: fixed release assertion during state restore when using the Sound Blaster 16 emulation (bug #5042)
Security: fixed vulnerability that allowed to execute commands with root privileges
Linux hosts: fixed runtime assertion in semaphore implementation which was triggered under certain conditions (bug #616)
Linux hosts: change the default USB access mode on certain distributions (bugs #3394 and #4291)
Linux hosts: on hardened Gentoo, the VBoxSVC daemon crashed by opening the VM network settings (bug #3732)
Linux hosts, Solaris hosts: pass the XAUTHORITY variable along the DISPLAY variable when starting a VM from VBoxManage or from the VM selector (bug #5063)
Linux hosts: use sysfs to enumerate host drives if hal is not available
Solaris hosts: fixed a bug which would hang the host sporadically as interrupts were not re-enabled everytime
Solaris hosts: fixed a kernel panic with bridged and host-only networking (bug #4775)
Solaris hosts: fixed incorrectly persistent CD/DVD-ROMs when changing them (bug #5077)
X11-based hosts: support additional function keys on Sun keyboards (bug #4907)
Mac OS X hosts (Snow Leopard): fixed problem starting headless VMs without a graphical session (bug #5002)
Mac OS X hosts: fixed problem listing host-only adapter names with trailing garbage (attached VMs won't start)
Windows Additions: now work with Vista 64-bit Home editions (bug #3865)
Windows Additions: fixed screen corruption with ZoomText Magnifier
Windows Additions: fixed NPGetUniversalName failure (bug #4853)
Windows Additions: fixed Windows NT regression (bug #4946)
Windows Additions: fixed VBoxService not running if no Shared Folders are installed
Linux Additions: implemented ftrunctate (bug #4771)
VRDP: start VM even if configured VRDP port is in use
Networking: the PCnet network device stopped receiving under rare conditions (bug #4870)
VBoxManage: implemented controlvm vrdpport command
iSCSI: fixed issue with NetApp targets (#5072)
SCSI: add support for virtual disks larger than 2TB
USB: fixed potential crash when unplugging USB2 devices (bug #5089)
NAT: IPSEC did not properly work with Linux guests (bug #4801)

Changes for v3.0.4 - v3.0.6

This is a maintenance release. The following items were fixed and/or added:
VMM: fixed IO-APIC overhead for 32 bits Windows NT, 2000, XP and 2003 guests (AMD-V only; bug #4392)
VMM: fixed a Guru meditation under certain circumstances when enabling a disabled device (bug #4510)
VMM: fixed a Guru meditation when booting certain Arch Linux guests (software virtualization only; bug #2149)
VMM: fixed hangs with 64 bits Solaris & OpenSolaris guests (bug #2258)
VMM: fixed decreasing rdtsc values (AMD-V & VT-x only; bug #2869)
VMM: small Solaris/OpenSolaris performance improvements (VT-x only)
VMM: cpuid change to correct reported virtual CPU id in Linux
VMM: NetBSD 5.0.1 CD hangs during boot (VT-x only; bug #3947)
Solaris hosts: worked around an issue that caused the host to hang (bug #4486)
Solaris hosts: fixed a rare host system deadlock when using bridged networking
Solaris hosts: fixed a potential host system deadlock when CPUs were onlined or offlined
Solaris hosts installer: added missing dependency for UTF-8 package (bug #4899)
Linux hosts: don't crash on Linux PAE kernels < 2.6.11 (in particular RHEL/CentOS 4); disable VT-x on Linux kernels < 2.6.13 (bug #1842)
Linux/Solaris hosts: correctly detect keyboards with fewer keys than usual (bug #4799)
Mac OS X hosts: prevent password dialogs in 32 bits Snow Leopard
Python WS: fixed issue with certain enumerations constants having wrong values in Python webservices bindings
Python API: several threading and platform issues fixed
Python shell: added exportVM command
Python shell: various improvements and bugfixes
Python shell: corrected detection of home directory in remote case
OVF: fixed XML comment handling that could lead to parser errors
Main: fixed a rare parsing problem with port numbers of USB device filters in machine settings XML
Main: restrict guest RAM size to 1.5 GB (32 bits Windows hosts only)
Main: fixed possible hang during guest reboot (bug #3792)
GUI: fixed rare crash when removing the last disk from the media manager (bug #4795)
VBoxManage: fixed guestproperty for Mac OS X hosts (bug #3806)
VBoxManage: fixed setting guest properties with --flags or -flags
Webservice: fixed a severe memory leak, at least on platforms using XPCOM
Serial: fixed host mode (Solaris, Linux and Mac OS X hosts; bug #4672)
VRDP: Remote USB Protocol version 3
SATA: fixed hangs and BSODs introduced with 3.0.4 (bugs #4695, #4739, #4710)
SATA: fixed a bug which prevented Windows 7 from detecting more than one hard disk
SATA/SCSI: fixed rare random guest crashes and hangs
SCSI: fixed problem with Fedora 11 refusing to boot after kernel update
iSCSI: fix logging out when the target has dropped the connection, fix negotiation of simparameters, fix command resend when the connection was dropped, fix processing SCSI status for targets which do not use phase collapse
BIOS: fixed a bug that caused the OS/2 boot manager to fail (2.1.0 regression, bug #3911)
PulseAudio: don't hang during VM termination if the connection to the server was unexpectedly terminated (bug #3100)
Mouse: fixed weird mouse behaviour with SMP (Solaris) guests (bug #4538)
HostOnly Network: fixed failure in CreateHostOnlyNetworkInterface() on Linux (no GUID)
HostOnly Network: fixed wrong DHCP server startup while hostonly interface bringup on Linux
HostOnly Network: fixed incorrect factory and default MAC address on Solaris
HostOnly Network: fixed the problem with listing host-only interfaces on Mac OS X when all physical interfaces are down (bugs #4698, #4790)
DHCP: fixed a bug in the DHCP server where it allocated one IP address less than the configured range
E1000: fixed receiving of multicast packets
E1000: fixed up/down link notification after resuming a VM
NAT: fixed ethernet address corruptions (bug #4839)
NAT: fixed hangs, dropped packets and retransmission problems (bug #4343)
Bridged Network: fixed packet queue issue which might cause DRIVER_POWER_STATE_FAILURE BSOD for Windows hosts (bug #4821)
Windows Additions: fixed a bug in VBoxGINA which prevented selecting the right domain when logging in the first time
Windows host installer: should now also work on unicode systems (like Korean, bug #3707)
Windows host installer: check for sufficient disk space
Shared clipboard: do not send zero-terminated text to X11 guests and hosts (bug #4712)
Shared clipboard: use a less CPU intensive way of checking for new data on X11 guests and hosts (bug #4092)
Guest Additions: do not hide the host mouse cursor when restoring a saved state (bug #4700)
Windows guests: fixed issues with the display of the mouse cursor image (bugs #2603, #2660 and #4817)
SUSE 11 guests: fixed Guest Additions installation (bug #4506)
Guest Additions: support Fedora 12 Alpha guests (bugs #4731, #4733 and #4734)

Changes for v3.0.2 - v3.0.4

VMM: 64 bits guest stability fixes (AMD-V only; bugs #3923 & #3666)
VMM: SMP stability fixes (AMD-V only)
VMM: SMP performance improvement (esp. for Solaris guests)
VMM: eliminated several bugs which could lead to a host reboot
VMM: fixed OS/2 ACP2 boot floppy hang (VT-x only)
VMM: small performance improvement for OpenSolaris guests (AMD-V only)
VMM: fixed CentOS/Xen reboot (software virtualization only; bug #4509)
SATA: fixed hangs / BSOD during Windows XP installation (bug #4342)
SATA: mark the ports as non hotpluggable (bug #3920)
3D support: fix deadlocks and context/window tracking for multithreaded applications (bug #3922)
3D support: fix memory leaks when terminating OpenGL guest applications
3D support: fix crash in Call of Duty
NAT: using two or more NAT adapters in one VM was broken (3.0.0 regression)
NAT: fixed network communication corruptions (bugs #4499, #4540, #4591, #4604)
NAT: fixed passive ftp access to host server (bug #4427)
iSCSI: fixed cloning to/from iSCSI disks
GUI: fixed path separator handling for the OVF export on Windows (bug #4354)
GUI: the mini toolbar was only shown on the first host display (bug #4654)
GUI: added a VM option to display the mini toolbar on top
GUI: don’t crash when adding plus configuring host-only network interfaces
Shared Folders: fixed selection of a drive root directory as a shared folder host path in VirtualBox (Windows host only)
USB: fixed a bug that may have rendered USB devicefilter settings inactive (3.0.2 regression, bug #4668)
Guest Additions: report the Guest Additions version to the guest properties (bug #3415)
Mac OS X hosts: fix creation of VMDK files giving raw partition access (bug #1461)
Mac OS X hosts: improved support for Snow Leopard
Linux hosts: fixed problems leading to wrong colors or transparency in host windows with some graphics drivers (bug #3095)
Linux hosts: hardware detection fallbacks if the hal service fails to find any DVD drives.
Linux and Solaris hosts: Work around color handling problems in Qt (bug #4353)
Solaris hosts: fixed memory leaks in host-only networking
Solaris Installer: fixed incorrect netmask for Host-only interface (bug #4590)
Solaris Installer: added package dependency for Python and Python-devel (bug #4570)
X11 guests: prevent windows from being skipped in seamless mode KDE guests (bugs #1681 and #3574)
X11 guests: fixed screen corruption in X11 guests when large amounts of video RAM were allocated (bug #4430)
X11 guests: some fixes when switching between host and guest-drawn mouse pointers.
X11 guests: fixed an issue which caused seamless mode to stop working as it should (the main issue listed in bug #2238).

Changes for v3.0.0 - v3.0.2

This is a maintenance release. The following items were ?xed and/or added:
VMM: fixed network regressions (guest hangs during network IO) (bug #4343)
VMM: guest SMP performance improvements
VMM: fixed hangs and poor performance with Kaspersky Internet Security (VT-x/AMD-V only; bug #1778)
VMM: fixed crashes when executing certain Linux guests (software virtualization only; bugs #2696 & #3868)
ACPI: fixed Windows 2000 kernel hangs with IO-APIC enabled (bug #4348)
APIC: fixed high idle load for certain Linux guests (3.0 regression)
BIOS: properly handle Ctrl-Alt-Del in real mode
iSCSI: fixed configuration parsing (bug #4236)
OVF: fix potential confusion when exporting networks
OVF: compatibility fix (bug #4452)
NAT: fixed crashes under certain circumstances (bug #4330)
3D support: fixed dynamic linking on Solaris/OpenSolaris guests (bug #4399)
3D support: fixed incorrect context/window tracking for multithreaded apps
Shared Folders: fixed loading from saved state (bug #1595)
Shared Folders: host file permissions set to 0400 with Windows guest (bug #4381)
X11 host and guest clipboard: fixed a number of issues, including bug #4380 and #4344
X11 Additions: fixed some issues with seamless windows in X11 guests (bug #3727)
Windows Additions: added VBoxServiceNT for NT4 guests (for time synchronization and guest properties)
Windows Additions: fixed version lookup
Linux hosts: workaround for buggy graphics drivers showing a black VM window on recent distributions (bug #4335)
Linux hosts: fixed typo in kernel module startup script (bug #4388)
Installer: support Pardus Linux
Solaris hosts: several installer fixes
Solaris host: fixed a preemption issue causing VMs to never start on Solaris 10 (bug #4328).
Solaris guest: fixed mouse integration for OpenSolaris 2009.06 (bug #4365)
Windows hosts: fixed high CPU usage after resuming the host (bug #2978)
OVF: accept ovf:/disk/ specifiers with a single slash in addition to ovf://disk/ (bug #4452)
Fixed a settings file conversion bug which sometimes caused hardware acceleration to be enabled for virtual machines that had no explicit configuration in the XML.

Changes for v2.2.4 - v3.0.0

Guest SMP with up to 32 virtual CPUs (VT-x and AMD-V only; see chapter 3.7.2.2 of the user manual)
Windows guests: ability to use Direct3D 8/9 applications / games (experimental; see chapter 4.8 of the user manual)
Support for OpenGL 2.0 for Windows, Linux and Solaris guests
In addition, the following items were ?xed and/or added:
Solaris hosts: allow suspend/resume on the host when a VM is running (bug #3826)
Solaris hosts: loosen the restriction for contiguous physical memory under certain conditions
Mac OS X hosts: ?xed guest PAE
Linux hosts: kernel module compile ?xes for 2.6.31 (bug #4264)
VMM: ?xed occasional guru meditation when loading a saved state (VT-x only)
VMM: eliminated IO-APIC overhead with 32 bits guests (VT-x only, some Intel CPUs don’t support this feature (most do); bug #638)
VMM: ?xed 64 bits CentOS guest hangs during early boot (AMD-V only; bug #3927)
VMM: performance improvements for certain PAE guests (e.g. Linux 2.6.29+ kernels)
VMM: some Windows guests detected a completely wrong CPU frequency (bug #2227)
VMM: ?xed hanging and unkillable VM processes (bug #4040)
VMM: ?xed random infrequent guest crashes due to XMM state corruption (Win64 hosts only)
VMM: performance improvements for network I/O (VT-x/AMD-V only)
GUI: added mini toolbar for fullscreen and seamless mode (Thanks to Huihong Luo)
GUI: redesigned settings dialogs
GUI: allow to create/remove more than one host-only network adapters (non Windows hosts)
GUI: display estimated time for long running operations (e.g. OVF import/export)
GUI: ?xed rare hangs when open the OVF import/export wizards (bug #4157)
3D support: ?xed VM crashes for client applications using incorrect OpenGL states
3D support: ?xed memory corruption when querying for supported texture compression formats
3D support: ?xed incorrect rendering of glDrawRangeElements
3D support: ?xed memory leak when using VBOs
3D support: ?xed glew library detection
3D support: ?xed random textures corruption
VRDP: support Windows 7 RDP client
Networking: ?xed another problem with TX checksum of?oading with Linux kernels up to version 2.6.18
NAT: ?xed “open ports on virtual router 10.0.2.2 - 513, 514” (forum)
NAT: allow to con?gure socket and internal parameters
NAT: allow to bind sockets to speci?c interface
PXE boot: signi?cant performance increase (VT-x/AMD-V only)
VHD: properly write empty sectors when cloning of VHD images (bug #4080)
VHD: ?xed crash when discarding snapshots of a VHD image
VHD: ?xed access beyond the block bitmap which could lead to arbitrary crashes
VBoxManage: ?xed incorrect partition table processing when creating VMDK ?les giving raw partition access (bug #3510)
VBoxManage: support cloning to existing image ?le
OVF: several OVF 1.0 compatibility ?xes
OVF: ?xed exporting of disk images when multiple virtual machines are exported at once
Virtual mouse device: eliminated micro-movements of the virtual mouse which were confusing some applications (bug #3782)
Shared Folders: sometimes a ?le was created using the wrong permissions (2.2.0 regression; bug #3785)
Shared Folders: allow to change ?le attributes from Linux guests and use the correct ?le mode when creating ?les
Shared Folders: some content was incorrectly written under certain conditions (bug #1187)
Shared Folders: ?xed incorrect ?le timestamps, when using Windows guest on a Linux host (bug #3404)
X11 clipboard: ?x duplicate end of lines (bug #4270)
X11 guests: a number of shared clipboard ?xes
Linux guests: Guest Additions support for SUSE Linux Enterprise Desktop 11
Linux guests: new daemon vboxadd-service to handle time synchronization and guest property lookup
Linux guests: implemented guest properties (OS info, logged in users, basic network information)
Windows host installer: VirtualBox Python API can now be installed automatically (requires Python and Win32 Extensions installed)
USB: Support for high-speed isochronous endpoints has been added. In addition, read-ahead buffering is performed for input endpoints (currently Linux hosts only). This should allow additional devices to work, notably webcams (bug #242).
USB: ?xed error handling for some USB dongles
Web service: ?xed inability to handle NULL pointers for object arguments, which are valid values for a lot of APIs, in both the raw and the object-oriented web service.
Web service: object-oriented bindings for JAX-WS did not exhibit interface inheritance correctly, ?xed
Web service: added support for IDisplay and IGuest interfaces, which were previously unavailable
Registration dialog uses Sun Online accounts now

Changes for v2.2.2 - v2.2.4

This is a maintenance release. The following items were ?xed and/or added:
Windows Installer: ?xed a potential hang during installation
Windows Installer: ?xed several problems (bug #3892)
Solaris hosts: make it work with Solaris build 114 or later (bug #3981)
Solaris hosts: ?xed a bug serial port character handling found during loopback (bug #3120)
Linux hosts: adapted vboxdrv.sh to the latest changes in VBoxManage list runningvms (bug #4034)
Windows hosts: ?xed a crash caused by host-only/bridged networking
Mac OS X hosts: ?xed access to host DVD with passthrough disabled (bug #4077)
Guest Additions: ?xed problems with KDE 4 not recognizing mouse clicks
Windows Additions: ?xed incorrect 8-bit guest color depth in Windows 7 guests
GUI: warn if VT-x/AMD-V could not be enabled for guests that require this setting (bug #4055)
VMM: ?xed occassional crash due to insuf?ent memory
VMM: ?xed hanging 64 bits Solaris guests
VMM: restore from a saved state occassionally failed (bugs #3984 and #2742)
Clipboard: ?xed a deadlock while shutting down the shared clipboard on X11 hosts (bug #4020)
OVF: ?xed potential hang during import
OVF: ?xed potential crashes during import/export on Win64 hosts
VBoxManage modifyhd --compact: ?xed bug which could lead to crashes and image corruption (bug #3864)
VBoxManage metrics collect: now ?ushes the output stream.
VHD: made VBoxManage internalcommands sethduuid work for .vhd ?les (bug #3443)
VHD: some .vhd ?les could not be cloned (bug #4080)
VMDK: ?xed creating snapshots
NAT: improvement of TCP connection establisment (bug #2987)
NAT: ?xed order of DNS servers in DHCP lease (bug #4091)
NAT: ?xed DHCP lease for multiple name servers (bug #3692)
NAT: ?xed a potential segfault if the host lost its connectivity (bug #3964)
Shared Folders: deny access to parent directories on Windows hosts (bug #4090)
Shared Folders: make rm/rmdir work with Solaris guests on Windows hosts
Networking: ?xed the problem with blocked receiving thread when a broadcast packet arrives too early to be handled by uninitialized e1000 adapter.
Networking: ?xed the problem that caused host freezes/crashes when using bridged mode with host’s interface having RX checksum of?oading on (bug #3926 and related). Fixes problems with TX of?oading as well (bug #3870)
PXE boot: Added support for PRO/1000 MT Server adapter.
Python bindings: ?xed keyword con?ict
SCSI: ?xed occasional crashes on Win64
Serial: allow to redirect the serial port to a raw ?le (bug #1023)
VRDP: ?xed a rare incorrect screen update

Changes for v2.1.4 - v2.2.0

This version is a major update. The following major new features were added:
OVF (Open Virtualization Format) appliance import and export (see chapter 3.8, Importing and exporting virtual machines, User Manual page 55)
Host-only networking mode (see chapter 6.7, Host-only networking, User Manual page 88)
Hypervisor optimizations with signi?cant performance gains for high context switching rates
Raised the memory limit for VMs on 64-bit hosts to 16GB
VT-x/AMD-V are enabled by default for newly created virtual machines
USB (OHCI & EHCI) is enabled by default for newly created virtual machines (Qt GUI only)
Experimental USB support for OpenSolaris hosts
Shared folders for Solaris and OpenSolaris guests
OpenGL 3D acceleration for Linux and Solaris guests (see chapter 4.8, Hardware 3D acceleration (OpenGL), User Manual page 70)
Added C API in addition to C++, Java, Python and Web Services
In addition, the following items were fixed and/or added:
VMM: FreeBSD guest related fix for V86 ?ags (bug #2342)
VMM: ?xed guru meditation when booting an AsteriskNow Linux VM (bug #2342)
VMM: ?xed PGMPOOLKIND_FREE guru meditation (bugs #3356, #3431)
VMM: ?xed Windows XP boot hang (guest PAE + nested paging only)
VMM: allow mixing of VT-x/AMD-V and software virtualization
VMM: ?xed extremely slow safe mode booting in e.g. Windows 2008 (VT-x/AMD-V only)
VMM: signi?cant speedup of certain GRUB boot loaders (e.g. Solaris) (VT-x/AMD-V only)
VMM: real-mode IOPL ?x for DOS guests (VT-x only)
VMM: ?xed VT-x detection with certain BIOSes that enable VT-x, but don’t set the lock bit in MSR_IA32_FEATURE_CONTROL
VMM: ?xed hibernation issues on Windows XP hosts (VT-x only; bug #1794)
VMM: properly emulate RDMSR from the TSC MSR, should ?x some NetBSD guests
VMM: emulate RDPMC; ?xes Windows guests crashes when using the Kaspersky virus scanner (bug #1778)
NAT: ?xed truncated downloads (FTP) (bug #3257)
NAT: blocked UDP packets caused a crash (bug #3426)
NAT: allow to con?gure the next server and the boot ?le via VBoxManage (bug #2759)
IDE: ?xed hard disk upgrade from XML-1.2 settings (bug #1518)
Hard disk: support more VMDK ?le variants (including ?xed-size ESX server images)
Hard disks: refuse to start the VM if a disk image is not writable
USB: further reduced host CPU utilization for OHCI and EHCI; the “VBoxInternal/Devices/usb-ohci/0/Con?g/FrameRate” CFG key is no longer necessary and no longer supported
USB: ?xed BSOD on the host with certain USB devices (Windows hosts only; bug #1654)
E1000: properly handle cable disconnects (bug #3421)
VRDP: ?xed hangs when VRDP server is enabled or disabled in runtime
Shared folders: respect umask settings on Linux, OSX and Solaris hosts when creating ?les
X11 guests: prevented setting the locale in vboxmouse, as this caused problems with Turkish locales (bug #3563)
X11 guests: show the guest mouse pointer at the right position if the virtual desktop is larger than the guest resolution (bug #2306)
Linux additions: ?xed typo when detecting Xorg 1.6 (bug #3555)
Solaris guests: added xpg4/xcu4 dependency to the guest additions installer (bug #3524)
Windows guests: bind the VBoxMouse.sys ?lter driver to the correct guest pointing device (bug #1324)
Windows hosts: ?xed BSOD when starting a VM with enabled host interface (bug #3414)
Linux hosts: do proper reference counting to prevent unloading the vboxnet?t module as long as this code is in use (bug #3104)
Linux hosts: do not leave zombies of VBoxSysInfo.sh (bug #3586)
Linux installers: ?xes for Slackware, Arch Linux and Linux from Scratch systems
Windows installers: combined installer executable which contains both (32- and 64-bit) architectures.
VBoxManage: less cryptic command-line error messages
VBoxManage list vms commands now default to compact format
VBoxManage controlvm dvdattach did not work if the image was attached before
VBoxManage: allow creation of all supported disk image variants
VBoxManage showvminfo: don’t spam the release log if the additions don’t support statistics information (bug #3457)
VBoxManage: big command line processing cleanup, the legacy single-dash options are deprecated and will be removed in the next major release, so switch to the new options now
Hard disks: improved immutable disk support to auto-reset diff ?le at VM startup (related to bug #2772)
GUI: enable the audio adapter by default for new VMs
GUI: warn if VT-x/AMD-V is not operational when starting a 64-bit guest
GUI: deactivate 64-bit guest support when the host CPU does not support VT-x/AMD-V
GUI: removed ?oppy icon from the status bar
GUI: show build revision in about dialog
GUI: ?xed sticky status bar text
GUI: improved error dialogs
GUI: fail with an appropriate error message when trying to boot a read-only disk image (bug #1745)
GUI/Mac OS X: ?xed disabled close button
GUI/Windows: re-enabled support for copy and paste (Windows hosts 2.0 regression; bug #2065)
3D support: added OpenGL select/feedback support (bug #2920)
3D support: close OpenGL subsystem for terminated guest applications (bug #3243)
3D support: ?xed VM hangs when starting guests with 3D acceleration enabled (bug #3437)
PXE: ?xed boot hangs when hardware virtualization is used (bug #2536)
LsiLogic: ?xed problems with Solaris guests
Main API: close machine settings XML ?le when unregistering machine (bug #3548)

Changes for v2.1.0 - v2.1.2

USB: improved support for recent Linux hosts
VMM: ﬁxed guru meditation for PAE guests on non-PAE hosts (AMD-V)
VMM: ﬁxed guru meditation on Mac OS X hosts when using VT-x
VMM: allow running up to 1023 VMs on 64-bit hosts (used to be 127)
VMM: several FreeBSD guest related ﬁxes (bugs #2342, #2341, #2761)
VMM: ﬁxed guru meditation when installing Suse Enterprise Server 10U2 (VT-x only; bug #3039)
VMM: ﬁxed guru meditation when booting Novell Netware 4.11 (VT-x only; bug #2898)
VMM: ﬁxed VERR_ADDRESS_TOO_BIG error on some Mac OS X systems when starting a VM
VMM: clear MSR_K6_EFER_SVME after probing for AMD-V (bug #3058)
VMM: ﬁxed guru meditation during Windows 7 boot with more than 2 GB guest RAM (VT-x, nested paging only)
VMM: ﬁxed hang during OS/2 MCP2 boot (AMD-V and VT-x only)
VMM: ﬁxed loop during OpenBSD 4.0 boot (VT-x only)
VMM: ﬁxed random crashes related to FPU/XMM with 64 bits guests on 32 bits hosts
VMM: ﬁxed occasional XMM state corruption with 64 bits guests
VMM: speed improvements for real mode and protected mode without paging (software virtualization only)
GUI: raised the RAM limit for new VMs to 75% of the host memory
GUI: added Windows 7 as operating system type
VBoxSDL: ﬁxed -fixed fixedmode parameter (bug #3067)
Clipboard: stability ﬁxes (Linux and Solaris hosts only, bug #2675 and #3003)
3D support: ﬁxed VM crashes for certain guest applications (bugs #2781, #2797, #2972, #3089)
LsiLogic: improved support for Windows guests (still experimental)
VGA: ﬁxed a 2.1.0 regression where guest screen resize events were not properly handled (bug #2783)
VGA: signiﬁcant performance improvements when using VT-x/AMD-V on Mac OS X hosts
VGA: better handling for VRAM offset changes (ﬁxes GRUB2 and Dos DOOM display issues)
VGA: custom VESA modes with invalid widths are now rounded up to correct ones (bug #2895)
IDE: ﬁxed ATAPI passthrough support (Linux hosts only; bug #2795)
Networking: ﬁxed kernel panics due to NULL pointer dereference in Linux kernels < 2.6.20 (Linux hosts only; bug #2827)
Networking: ﬁxed intermittend BSODs when using the new host interface (Windows hosts only; bugs #2832, #2937, #2929)
Networking: ﬁxed several issues with displaying hostif NICs in the GUI (Windows hosts only; bugs 2814, #2842)
Networking: ﬁxed the issue with displaying hostif NICs without assigned IP addresses (Linux hosts only; bug #2780)
Networking: ﬁxed the issue with sent packets coming back to internal network when using hostif (Linux hosts only; bug #3056).
NAT: ﬁxed port forwarding (Windows hosts only; bug #2808)
NAT: ﬁxed booting from the builtin TFTP server (bug #1959)
NAT: ﬁxed occasional crashes (bug #2709)
SATA: vendor product data (VPD) is now conﬁgurable
SATA: raw disk partitions were not recognized (2.1.0 regression, Windows host only, bug #2778)
SATA: ﬁxed timeouts in the guest when using raw VMDK ﬁles (Linux host only, bug #2796)
SATA: huge speed up during certain I/O operations like formatting a drive
SATA/IDE: ﬁxed possible crash/errors during VM shutdown
VRDP: ﬁxed loading of libpam.so.1 from the host (Solaris hosts only)
VRDP: ﬁxed RDP client disconnects
VRDP: ﬁxed VRDP server misbehavior after a broken client connection
VBoxManage showvminfo: ﬁxed assertion for running VMs (bug #2773)
VBoxManage convertfromraw: added parameter checking and made it default to creating VDI ﬁles; ﬁxed and documented format parameter (bug #2776)
VBoxManage clonehd: ﬁxed garbled output image when creating VDI ﬁles (bug #2813)
VBoxManage guestproperty: ﬁxed property enumeration (incorrect parameters/exception)
VHD: ﬁxed error when attaching certain container ﬁles (bug #2768)
Solaris hosts: added support for serial ports (bug #1849)
Solaris hosts: ﬁx for Japanese keyboards (bug #2847)
Solaris hosts: 32-bit and 64-bit versions now available as a single, uniﬁed package
Linux hosts: don’t depend on libcap1 anymore (bug #2859)
Linux hosts: compile ﬁxes for 2.6.29-rc1
Linux hosts: don’t drop any capability if the VM was started by root (2.1.0 regression)
Mac OS X hosts: save the state of running or paused VMs when the host machine’s battery reaches critical level
Mac OS X hosts: improved window resizing of the VM window
Mac OS X hosts: added GUI option to disable the dock icon realtime preview in the GUI to decrease the host CPU load when the guest is doing 3D
Mac OS X hosts: polished realtime preview dock icon
Windows Additions: ﬁxed guest property and logging OS type detection for Windows 2008 and Windows 7 Beta
Windows Additions: added support for Windows 7 Beta (bugs #2995, #3015)
Windows Additions: ﬁxed Windows 2000 guest freeze when accessing ﬁles on shared folders (bug #2764)
Windows Additions: ﬁxed Ctrl-Alt-Del handling when using VBoxGINA
Windows Additions Installer: Added /extract switch to only extract (not install) the ﬁles to a directory (can be speciﬁed with /D=path)
Linux installer and Additions: added support for the Linux From Scratch distribution (bug #1587) and recent Gentoo versions (bug #2938)
Additions: added experimental support for X.Org Server 1.6 RC on Linux guests
Linux Additions: ﬁxed bug which prevented to properly set fmode on mapped shared folders (bug #1776)
Linux Additions: ﬁxed appending of ﬁles on shared folders (bug #1612)
Linux Additions: ignore noauto option when mounting a shared folder (bug #2498)
Linux Additions: ﬁxed a driver issue preventing X11 from compiling keymaps (bug #2793 and #2905)
X11 Additions: workaround in the mouse driver for a server crash when the driver is loaded manually (bug #2397)

Changes for v2.0.6 - v2.1.0

Support for hardware virtualization (VT-x and AMD-V) on Mac OS X hosts
Support for 64-bit guests on 32-bit host operating systems (experimental; see user manual, chapter 1.6, 64-bit guests, page 16)
Added support for Intel Nehalem virtualization enhancements (EPT and VPID; see user manual, chapter 1.2, Software vs. hardware virtualization (VT-x and AMD-V), page 10))
Experimental 3D acceleration via OpenGL (see user manual, chapter 4.8, Hardware 3D acceleration (OpenGL), page 66)
Experimental LsiLogic and BusLogic SCSI controllers (see user manual, chapter 5.1, Hard disk controllers: IDE, SATA (AHCI), SCSI, page 70)
Full VMDK/VHD support including snapshots (see user manual, chapter 5.2, Disk image ?les (VDI, VMDK, VHD), page 72)
New NAT engine with signi?cantly better performance, reliability and ICMP echo (ping) support (bugs #1046, #2438, #2223, #1247)
New Host Interface Networking implementations for Windows and Linux hosts with easier setup (replaces TUN/TAP on Linux and manual bridging on Windows)
In addition, the following items were ?xed and/or added:
VMM: signi?cant performance improvements for VT-x (real mode execution)
VMM: support for hardware breakpoints (VT-x and AMD-V only; bug #477)
VMM: VGA performance improvements for VT-x and AMD-V
VMM: Solaris and OpenSolaris guest performance improvements for AMD-V (Barcelona family CPUs only)
VMM: ?xed guru meditation while running the Dr. Web virus scanner (software virtualization only; bug #1439)
VMM: deactivate VT-x and AMD-V when the host machine goes into suspend mode; reactivate when the host machine resumes (Windows, Mac OS X & Linux hosts; bug #1660)
VMM: ?xed guest hangs when restoring VT-x or AMD-V saved states/snapshots
VMM: ?xed guru meditation when executing a one byte debug instruction (VT-x only; bug #2617)
VMM: ?xed guru meditation for PAE guests on non-PAE hosts (VT-x)
VMM: disallow mixing of software and hardware virtualization execution in general (bug #2404)
VMM: ?xed black screen when booting OS/2 1.x (AMD-V only)
GUI: pause running VMs when the host machine goes into suspend mode (Windows & Mac OS X hosts)
GUI: resume previously paused VMs when the host machine resumes after suspend (Windows & Mac OS X hosts)
GUI: save the state of running or paused VMs when the host machine’s battery reaches critical level (Windows hosts)
GUI: properly restore the position of the selector window when running on the compiz window manager
GUI: properly restore the VM in seamless mode (2.0 regression)
GUI: warn user about non optimal memory settings
GUI: structure operating system list according to family and version for improved usability
GUI: prede?ned settings for QNX guests
IDE: improved ATAPI passthrough support
Networking: added support for up to 8 Ethernet adapters per VM
Networking: ?xed issue where a VM could lose connectivity after a reboot
iSCSI: allow snapshot/diff creation using local VDI ?le
iSCSI: improved interoperability with iSCSI targets
Graphics: ?xed handling of a guest video memory which is not a power of two (bug #2724)
VBoxManage: ?xed bug which prevented setting up the serial port for direct device access.
VBoxManage: added support for VMDK and VHD image creation
VBoxManage: added support for image conversion (VDI/VMDK/VHD/RAW)
Solaris hosts: added IPv6 support between host and guest when using host interface networking
Mac OS X hosts: added ACPI host power status reporting
API: redesigned storage model with better generalization
API: allow attaching a hard disk to more than one VM at a time
API: added methods to return network con?guration information of the host system
Shared Folders: performance and stability ?xes for Windows guests (Microsoft Of?ce Applications)

Changes for v2.0.4 - v2.0.6

VMM: ﬁxed Guru meditation when running 64 bits Windows guests (bug #2220)
VMM: ﬁxed Solaris 10U6 boot hangs (VT-x and AMD-V) bug #2565)
VMM: ﬁxed Solaris 10U6 reboot hangs (AMD-V only; bug #2565)
GUI: the host key was sometimes not properly displayed (Windows hosts only, bug #1996)
GUI: the keyboard focus was lost after minimizing and restoring the VM window via the Windows taskbar (bugs #784)
VBoxManage: properly show SATA disks when showing the VM information (bug #2624)
SATA: ﬁxed access if the buffer size is not sector-aligned (bug #2024)
SATA: improved performance
SATA: ﬁxed snapshot function with ports>1 (bug #2510)
E1000: ﬁxed crash under rare circumstances
USB: ﬁxed support for iPhone and Nokia devices (Linux host: bugs #470 & #491)
Windows host installer: added proper handling of open VirtualBox applications when updating the installation
Windows host installer: ﬁxed default installation directory on 64-bit on new installations (bug #2501)
Linux/Solaris/Darwin hosts: verify permissions in /tmp/vbox-$USER-ipc
Linux hosts: ﬁxed assertion on high network load (AMD64 hosts, ﬁx for Linux distributions with glibc 2.6 and newer (bug #616)
Linux hosts: don’t crash during shutdown with serial ports connected to a host device
Solaris hosts: ﬁxed incompatibility between IPSEC and host interface networking
Solaris hosts: ﬁxed a rare race condition while powering off VMs with host interface networking
Solaris hosts: ﬁxed VBoxSDL on Solaris 10 by shipping the required SDL library (bug #2475)
Windows additions: ﬁxed logged in users reporting via guest properties when using native RDP connections
Windows additions: ﬁxed Vista crashes when accessing shared folders under certain circumstances (bug #2461)
Windows additions: ﬁxed shared folders access with MS-Ofﬁce (bug #2591)
Linux additions: ﬁxed compilation of vboxvfs.ko for 64-bit guests (bug #2550)
SDK: added JAX-WS port caching to speedup connections

Changes for v2.0.2 - v2.0.4

VMM: better error reporting for VT-x failures
VMM: don’t overﬂow the release log with PATM messages (bug #1775)
VMM: ﬁxed save state restore in real mode (software virtualization only)
GUI: work around a Qt bug on Mac OS X (bug #2321)
GUI: properly install the Qt4 accessible plugin (bug #629)
SATA: error message when starting a VM with a VMDK connected to a SATA port (bug #2182)
SATA: ﬁxed Guru mediation when booting OpenSolaris/64; most likely applies to other guests as well (bug #2292)
Network: don’t crash when changing the adapter link state if no host driver is attached (bug #2333)
VHD: ﬁxed bug which prevents booting from VHD images bigger than 4GB (bug #2085)
VRDP: ﬁxed a repaint problem when the guest resolution was not equal to the client resolution
Clipboard: don’t crash when host service initialization takes longer than expected (Linux hosts only; bug #2001)
Windows hosts: VBoxSVC.exe crash (bug #2212)
Windows hosts: VBoxSVC.exe memory leak due to a Windows WMI memory leak (Vista only) (bug #2242)
Windows hosts: VBoxSVC.exe delays GUI startup
Linux hosts: handle jifﬁes counter overﬂow (VM stuck after 300 seconds of host uptime; bug #2247)
Solaris hosts: ﬁxed host or guest side networking going stale while using host interface networking (bug #2474)
Solaris hosts: added support for using unplumbed network interfaces and Crossbow Virtual Network Interfaces (VNICs) with host interface networking
Solaris hosts: reworked threading model improves performance for host interface networking
Windows additions: ﬁxed crash when accessing deep directory structures in a shared folder
Windows additions: improved shared folder name resolving (bug #1728)
Windows additions: ﬁxed Windows 2000 shutdown crash (bug #2254)
Windows additions: ﬁxed error code for MoveFile() if the target exists (bug #2350)
Linux additions: ﬁxed seek() for ﬁles bigger than 2GB (bug #2379)
Linux additions: support Ubuntu 8.10
Linux additions: clipboard ﬁxes (bug #2015)
Web services: improved documentation and ﬁxed example (bug #1642)

Changes for v2.0.0 - v2.0.2

VMM: fixed inability to run more than one VM in parallel (AMD-V on CPUs with erratum 170 only; bug #2167)
VMM: VT-x stability fixes (bug #2179 and others)
VMM: fixed Linux 2.6.26+ kernel crashes (used by Ubuntu 8.10 Alpha, Fedora 10 Alpha; bug #1875)
VMM: fixed 64 bits Linux 2.6.26 kernel crashes (Debian)
VMM: fixed Vista (32 bits) guest crash during boot when PAE and NX are enabled (applied to 64 bits hosts with VT-x enabled only)
VMM: fixed OS/2 guest crashes during boot (AMD-V; bug #2132)
GUI: fixed crash when trying to release an inaccessible image in the virtual disk manager
GUI: fixed invalid error message for a changed snapshot path even if that path wasn't changed (bug #2064)
GUI: fixed crash when creating a new hard disk image (bug #2060)
GUI: fixed crash when adding a hard disk in the VM settings (bug #2081)
GUI: fixed a bug where VirtualBox isn't working with the new QGtkStyle plugin (bug #2066)
GUI: fixed VM close dialog in seamless mode (Mac OS X hosts only; bug #2067)
GUI: fixed standard menu entries for NLS versions (Mac OS X hosts only)
GUI: disable the VT-x/AMD-V setting when it's not supported by the CPU (or on Mac OS X hosts)
VBoxManage: fixed crash during internalcommands createrawvmdk (bug #2184)
VBoxManage: fixed output of snapshot showvminfo (bug #698)
Guest properties: added information about guest network interfaces (Windows guests only)
Shared Folders: fixed regression that caused Windows guest crashes (bug #2055)
API: fixed number of installed CPUs (Solaris hosts only)
VRDP: allow a client to reconnect to an existing session on the VRDP server by dropping the existing connection (configurable and disabled by default; only relevant when multiconnection mode is disabled)
VRDP: fixed an image repaint problem
Linux hosts: fixed bug in vboxdrv.ko that could corrupt kernel memory and panic the kernel (bug #2078)
Linux hosts: compile fixes for kernel module on Linux 2.6.27
Mac OS X hosts: added Python support
Additions: fixed a possible hang in HGCM communication after a VM reboot
Windows additions: added support for Windows XP 64 bits (bug #2117)
Linux additions: deactivate dynamic resizing on Linux guests with buggy X servers
Linux additions: support Ubuntu 8.10 guests and Fedora 9 guests (dynamic resizing disabled for the latter) (bug #1854)
Linux additions: added installer check for the system architecture
Linux additions: fixed Xorg modules path for some Linux distributions (bug #2128)
VMDK: be more liberal with ambiguous parts of the format specification and accept more format variants (bug #2062)
VHD: fixed a bug in the VHD backend which resulted in reading the wrong data (bug #2085)
Solaris hosts: fixed kernel panic on certain machines when starting VMs with host interface networking (bug #2183)
Solaris hosts: fixed inability to access NFS shares on the host when host interface networking was enabled
Solaris hosts: installer now detects and reports when installing under the wrong architecture
Solaris hosts: fixed security hardening that prevented starting VMs from non-global zones even as root (bug #1948)
Solaris additions: combined the 32 bit and 64 bit additions installer into a single package
Mac OS X hosts: experimental support for attaching a real serial port to the guest

Changes for v1.6.6 - v2.0.0

64 bits guest support (64 bits host only)
New native Leopard user interface on Mac OS X hosts
The GUI was converted from Qt3 to Qt4 with many visual improvements
New-version notifier
Guest property information interface
Host Interface Networking on Mac OS X hosts
New Host Interface Networking on Solaris hosts
Support for Nested Paging on modern AMD CPUs (major performance gain)
Framework for collecting performance and resource usage data (metrics)
Added SATA asynchronous IO (NCQ: Native Command Queuing) when accessing raw disks/partitions (major performance gain)
Clipboard integration for OS/2 Guests
Created separate SDK component featuring a new Python programming interface on Linux and Solaris hosts
Support for VHD disk images
In addition, the following items were fixed and/or added:
VMM: VT-x fixes
AHCI/SATA: improved performance
GUI: keyboard fixes
Linux installer: properly uninstall the package even if unregistering the DKMS module fails
Linux additions: the guest screen resolution is properly restored
Network: added support for jumbo frames (> 1536 bytes)
Shared Folders: fixed guest crash with Windows Media Player 11
Mac OS X: Ctrl+Left mouse click doesn’t simulate a right mouse click in the guest anymore. Use Hostkey+Left for a right mouse

Changes for v1.6.0 - v1.6.2

GUI: fixed a bug which prevented to add more than one SATA drive from the GUI
GUI: fixed a regression introduced in 1.6.0: the fullscreen mode was left on every guest video mode switch
GUI: fixed several minor issues
Networking: fixed a host interface networking regression introduced in 1.6.0
VMM: fixed starting of VMs with AMD-V enabled
VMM: massive performance enhancements for AMD-V
VMM: stability improvements for AMD-V on Windows hosts
VMM: correctly detect AMD CPUs with erratum 170 (AMD-V)
VMM: detect inconsistent timestamp counters on certain AMD Phenom CPUs (Windows host only)
VMM: fixed KVM check (Linux hosts only) XPCOM: fixed several races
VMM: ﬁxed a regression introduced in 1.6.0: Windows stuck during installation
SATA: improved performance with Vista guests
SATA: fixed statistics counter
Shared Folders: several fixes (iTunes download, speed up browsing)
ATA/IDE: fixed boot from CDROM if a medium was added while the boot menu was active
Networking: provide an Intel PRO/1000 T Server (82543GC) network device emulation which is recognized by Windows XP guests
Networking: fixes for the E1000 emulation (don't crash if not attached, fixed a bug in the statistics counter implementation)
NAT: don't crash if the guest sent a DHCPRELEASE message with an invalid IP address
NAT: fixed ARP reply for the NAT gateway and for the NAT name server if the guest IP range was changed
Internal Networking: fixed shutdown if more than two VMs are connected to the same network
BIOS: allow to change the DMI informatiton (see chapter 9.13, Con'guring the BIOS DMI information, page 125)
RTC: fixed UIP emulation to prevent jumping of time in Solaris guests
Windows host: VirtualBox installation directory corrected for 64 bits Windows
Windows host: fixed VBoxVRDP.exe symlink
Windows host: solved locking problems in raw partition VMDK support
Windows host: fixed stability during high system load (page fault in KeQueryActiveProcessors)
MacOS X host: fixed crashes under certain conditions
Shared Folders: limited users without admin rights now also can use Shared Folders on Windows guests
Linux hosts: fixed default runlevel for the kernel module helper script
Solaris hosts: enabled support for VT-x and AMD-V
Solaris hosts: dynamic loading of libdlpi fixes a problem where Solaris 10 was not able to start a VM
Linux additions: fixed runlevels for kernel module helper scripts
Linux additions: compatibility fixes with Linux 2.6.26
Linux additions: fixed occasional guest kernel crash during unload of the vboxadd guest kernel module

Changes for v1.5.6 - v1.6.0

This version is a major update. The following major new features were added:
Solaris and Mac OS X host support
Seamless windowing for Linux and Solaris guests
Guest Additions for Solaris
A webservice API
SATA hard disk (AHCI) controller
Experimental Physical Address Extension (PAE) support
In addition, the following items were ?xed and/or added:
GUI: added accessibility support (508)
GUI: VM session information dialog
VBoxHeadless: renamed from VBoxVRDP
VMM: reduced host CPU load of idle guests
VMM: many ?xes for VT-x/SVM hardware-supported virtualization
ATA/IDE: better disk geometry compatibility with VMware images
ATA/IDE: virtualize an AHCI controller
Storage: better write optimization, prevent images from growing unnecessarily.
Network: support PXE booting with NAT
Network: ?xed the Am79C973 PCNet emulation for Nexenta guests
NAT: improved builtin DHCP server (implemented DHCPNAK response)
NAT: port forwarding stopped when restoring the VM from a saved state
NAT: make subnet con?gurable
XPCOM: moved to libxml2
XPCOM: ?xed VBoxSVC autostart race
Audio: SoundBlaster 16 emulation
USB: ?xed problems with USB 2.0 devices
MacOS X: ?xed seamless mode
MacOS X: better desktop integration, several look’n’feel ?xes
MacOS X: switched to Quartz2D framebuffer
MacOS X: added support for shared folders
MacOS X: added support for clipboard integration
Solaris: added host audio playback support (experimental)
Solaris: made it possible to run VirtualBox from non-global zones
Shared Folders: made them work for NT4 guests
Shared Folders: many bug?xes to improve stability
Seamless windows: added support for Linux guests
Linux installer: support DKMS for compiling the kernel module
Linux host: compatibility ?xes with Linux 2.6.25
Windows host: support for USB devices has been signi?cantly improved; many additional USB devices now work
Windows Additions: automatically install AMD PCNet drivers on Vista guests
Linux additions: several ?xes, experimental support for RandR 1.2
Linux additions: compatibility ?xes with Linux 2.6.25

Changes for v1.5.4 - v1.5.6

GUI: fixed several error messages
GUI: fixed registration dialog crashes once and for all
GUI: really ask before resetting the VM
GUI: release mouse and keyboard before the host activates the screensaver
GUI: fixed issue with license display on big screens
GUI: added setting for network name for internal networks
GUI: added setting for network device type
GUI: keyboard fixes
GUI: seamless mode and fullscreen mode fixes
GUI: fixed soaked hostkey keyup event under certain conditions
GUI: more informative message dialog buttons
GUI: VM selector context menu
VBoxSDL: added -termacpi switch
VBoxSDL: ?xed automatic adaption of the guest screen resolution to the size of the VM window
VMM: under heavy guest activity, for example when copying files to/from a shared folder, the VM could crash with an assertion
VMM: added an option to select PIIX4 (improves compatibility with Windows guests created by VMware)
VMM: fixed a bug which could lead to memory corruption under rare circumstances
VMM: improved performance of Solaris guests
VRDP: fixed a 1.5.4 regression: VRDP client and server were out-of-sync if the VM was started using the GUI
VRDP: proper error handling if the VRDP library could not be loaded
VBoxManage: fixed crash during clonevdi
VBoxManage: added ’list runningvms’ command
VBoxManage: improved the compatibility when reading the partition table of a raw disk
Shared Folders: added support for read-only shared folders
Shared Clipboard: several fixes
Network: experimental support for E1000 device emulation
iSCSI: better check for miscon?gured targets
iSCSI: allow to directly attach to internal networks with integrated mini IP stack
PulseAudio: don’t hang during VM initialization if no sound server is available
VDI: fixed sized virtual disk images are now completely written during creation to workaround buggy sparse ?le handling on some OS (e.g. Vista)
VDI/VMDK: prevent indexing of .vdi and .vmdk files on Windows hosts
RDP: fixed compilation of the Linux rdesktop client on newer Linux kernels
RDP: install rdesktop-vrdp on Linux hosts
ACPI: added sleep button event
Serial: proper handling of inaccessible host devices
Windows installer: allow smooth upgrade without deinstallation
Linux installer: fixed Slackware detection regression
Linux installer: updated VBoxTunctl allowing to assign a tap device to a group on Linux kernels > 2.6.23
Windows additions: several fixes, in particular for Windows NT4
Linux additions: ?xed installer for Kubuntu 8.04
Linux additions: add default video mode for handling video mode hints from the host
Linux host: compatibility fixes with Linux > 2.6.24

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