= Changelog for VirtualBox 4.0 =

This page lists all changes of the !VirtualBox 4.0 '''[wiki:Download_Old_Builds_4_0 releases]'''.[[BR]]
All branches: [wiki:Changelog 6.1] · [wiki:Changelog-6.0 6.0] · [wiki:Changelog-5.2 5.2] · [wiki:Changelog-5.1 5.1] · [wiki:Changelog-5.0 5.0] · [wiki:Changelog-4.3 4.3] · [wiki:Changelog-4.2 4.2] · [wiki:Changelog-4.1 4.1] · [wiki:Changelog-4.0 4.0]

'''[[span(style=color: #FF0000, !VirtualBox 4.0.x is no longer supported!)]]'''

[=#v36]
'''!VirtualBox 4.0.36''' (released 2015-11-11)[[BR]][[BR]]
This is a maintenance release. The following items were fixed and/or added:
 * several fixes

[=#v34]
'''!VirtualBox 4.0.34''' (released 2015-10-20)[[BR]][[BR]]
This is a maintenance release. The following items were fixed and/or added:
 * several fixes
 * Windows hosts: hardening fixes

[=#v32]
'''!VirtualBox 4.0.32''' (released 2015-07-10)[[BR]][[BR]]
This is a maintenance release. The following items were fixed and/or added:
 * Linux hosts: fixed a bug which made the netfilter driver ignore certain events (bug #12264)

[=#v30]
'''!VirtualBox 4.0.30''' (released 2015-05-19)[[BR]][[BR]]
This is a maintenance release. The following items were fixed and/or added:
 * VRDP: fixed incompatibility with rdesktop 1.8.3
 * Floppy: several fixes

[=#v28]
'''!VirtualBox 4.0.28''' (released 2015-01-17)[[BR]][[BR]]
This is a maintenance release. The following items were fixed and/or added:
 * VRDP: fixed a rare crash when using remote audio input
 * Storage: fixed data corruption when resizing VHD images under certain circumstances

[=#v36]
'''!VirtualBox 4.0.26''' (released 2014-07-15)[[BR]][[BR]]
This is a maintenance release. The following items were fixed and/or added:
 * HGCM: fixed a problem with saved states which could cause several guest misbehavior after a VM was started from a saved state

[=#v24]
'''!VirtualBox 4.0.24''' (released 2014-03-14)[[BR]][[BR]]
This is a maintenance release. The following items were fixed and/or added:
 * 3D: several fixes
 * Additions: fixed CPU hot-remove on newer Linux kernels

[=#v22]
'''!VirtualBox 4.0.22''' (released 2014-01-10)[[BR]][[BR]]
This is a maintenance release. The following items were fixed and/or added:
 * HGCM: fixed crashes under certain conditions
 * Linux Additions: fixes for recent Linux kernels
 * Windows Additions: fixed guest crashes in in Shared Folders service under certain conditions

[=#v20]
'''!VirtualBox 4.0.20''' (released 2013-10-11)[[BR]][[BR]]
This is a maintenance release. The following items were fixed and/or added:
 * GUI: prevent crashes under certain conditions on X11 hosts
 * VRDP: fixed a rare crash on the guest screen resize
 * Storage: fixed data corruption after resizing a VDI image under certain circumstances (bug #11344)
 * Storage: fixed crash when connecting to certain QNAP iSCSI targets
 * Storage: fixed lost writes if iSCSI is used with snapshots and ansyc I/O (bug #11479)
 * Storage: fixed hang when creating a snapshot using Parallels disk images (bug #9617)
 * VBoxSVC: don't crash on systems with many VLAN interfaces
 * Main/OVF: don't crash during import if the client forgot to call Appliance::interpret() (bug #10845)
 * VBoxManage: don't crash during screenshotpng if there is no display (bug #11363)
 * Linux hosts: work around gcc bug 55940 which might lead to wrong kernel module code if gcc 4.7 is used to compile the 32-bit Linux host kernel (bug #11035)
 * Linux hosts: made "]" key work again on Japanese keyboards.
 * Linux hosts / guests: Linux 3.11 fixes (bug #11946, #12001)
 * Solaris / Mac OS X hosts: VM CPU load metrics now report 100% when all cores are fully utilized (used to be a single core)
 * Linux Additions: Linux 3.8 / 3.9 compile fixes (bug #11036)
 * 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)

[=#v18]
'''!VirtualBox 4.0.18''' (released 2012-12-18)[[BR]][[BR]]
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 a potential problem causing to schedule interrupts during ''SYSEXIT'' right after ''STI''
 * VMM: fixed a VM hang after a resume from pause / savestate with SMP guests in rare cases
 * VMM: fixed a potential guest memory corruption issue in page fusion
 * VMM: fixed host freezes with 64-bit guests on 32-bit Linux hosts (bug #10528)
 * VMM: fixed an interpretion bug for ''TPR read'' instructions under rare conditions (AMD-V only)
 * VMM: fixed handling of task gates if VT-x/AMD-V is disabled
 * Snapshots: fixed a crash when restoring an old snapshot when powering off a VM (bug #10491)
 * Main: host interfaces no longer have "defaults" for ip address and network mask attributes
 * 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 host (bug #3783)
 * Bridged Networking: fixed the problem with device driver unloading on kernels 3.2.18 and newer due to invalid reference counter (bug #10624)
 * NAT: fixed a crash under rare circumstances (Windows hosts only; bug #10128)
 * Virtio-net: fixed the problem with receiving of GSO packets in Windows XP guests causing packet loss in host-to-VM transfers
 * Virtio-net: fixed the problem with network statistics counters in Session Information dialog (GUI)
 * Storage: fixed a possible data corruption when compacting VDI images with snapshots
 * Storage: fixed audio CD passthrough for certain media players
 * Storage: fixed hang in case of unaligned requests and async I/O enabled
 * Storage: fixed hang with newer VHD images (bug #11279)
 * VGA: fixed wrong access check which might cause a crash under certain conditions
 * VGA: fix for double scan text modes
 * USB: don't crash if a USB device is plugged or unplugged when saving or loading the VM state (SMP guests only)
 * VBoxManage: fixed memory leak when executing and waiting for a guest process
 * VBoxManage: fixed converting disks from raw images
 * Solaris installer: fixed dependency checking while installing VirtualBox in a zone
 * Linux hosts / guests: fixes for Linux 3.3, 3.4, 3.5 and 3.7
 * Linux Additions: make 3D passthrough work on OEL/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: the guest content was sometimes not properly updated (bug #9887)
 * 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)
 * Windows Additions, VRDP: fixed occasional corruption of vertical text

[=#v16]
'''!VirtualBox 4.0.16''' (released 2012-01-11)[[BR]][[BR]]
This is a maintenance release. The following items were fixed and/or added:
 * VRDP: fixed screen corruption
 * VRDP: fixed screen freeze
 * ATA: fixed a possible crash during ATAPI passthrough with certain guests
 * NAT: the interface stopped working after a lot of failed ICMP requests (bug #9371)
 * Metrics: fixed potential problem with invalid access in guest metrics collection upon VM destruction
 * 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
 * VBoxSVC: fixed crash under rare circumstances (e.g. client crash)
 * VMDK/VHD: fixed a possible corruption with host cache disabled when using snapshots under rare circumstances (bug #9749)
 * OVF/OVA: fixed broken disk images on import under rare circumstances
 * Mac OS X hosts: fixed the problem with duplicate packets when bridged to wireless interface (bug #9648)
 * Windows Additions: implemented faster detection of logged-in guest users and stale sessions
 * Linux guests: fixes for Linux 3.2

[=#v14]
'''!VirtualBox 4.0.14''' (released 2011-10-18)[[BR]][[BR]]
This is a maintenance release. The following items were fixed and/or added:
 * VMM: fixed 64bit guests on AMD Fusion CPUs (bug #8824)
 * VMM: fixed handling of the sysenter/sysexit machine instructions in 64-bit guests on Intel hosts
 * 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 spurious LCtrl key events on some Windows hosts (4.0.6 regression; bug #373)
 * VBoxManage: fixed ''extpack install --replace''
 * VRDP: fixed a rare screen corruption
 * E1000: fixed rare Windows 7 guest hangs, either at boot time or when reconfiguring the network card in unusual setups (bug #6223)
 * Mouse support: fixed an off-by-one pointer position error affecting Windows guests (bugs #7566, #9321)
 * NAT: changed TCP connection establishment according to Winsock API requirements (Windows hosts only; bug #8919)
 * 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)
 * VBoxSVC: made the path comparison OS independent when images are registered (bug #9303)
 * Main: return the correct RDP default port fixing settings warnings in the GUI if the remote display was enabled at runtime (bug #9368)
 * Main: fix VM initialization if a shared folder does not exist (bug #7941)
 * Main: fixed taking screen shots (e.g. the preview window) for headless VMs if the Guest Additions are active
 * Main: fixed possible deadlock between hard disk enumeration and the resetting of immutable disks (bug #9549)
 * OVA: fixed import of renamed OVA files (bug #9033)
 * Virtio-net: fixed the problem with UDP packets exceeding MTU (bug #9370)
 * Solaris hosts: fixed starting EFI guests due to missing EFI ROM files (bug #9535)
 * Mac OS X hosts: fix installation issues when installed as root (bug #1578)
 * Windows Additions: fixed file truncation on a shared folder with some applications (bugs #9276, #9315)
 * Linux Additions: suppress an incorrect error message and allow a shared folder to be mounted in multiple places (bug #9627) 
 * Linux Additions: add support for X.Org Server 1.11 (bug #9519) 
 * Linux Additions: fixed ''llseek'' for Linux kernels 2.6.37 and above
 * 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)

[=#v12]
'''!VirtualBox 4.0.12''' (released 2011-07-15)[[BR]][[BR]]
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)

[=#v10]
'''!VirtualBox 4.0.10''' (released 2011-06-27)[[BR]][[BR]]
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)

[=#v8]
'''!VirtualBox 4.0.8''' (released 2011-05-16)[[BR]][[BR]]
This is a maintenance release. The following items were fixed and/or added:
 * Mac OS X hosts: fixed incompatibility with recent Mac OS X versions in 64-bit mode (bug #8474)
 * Mac OS X hosts: fixed incompatibility with hosts with more than 16 cores (bug #8389)
 * Mac OS X hosts: fixed painting corruptions on a second monitor in 64-bit mode (bug #7606)
 * GUI: restored functionality to set an empty host key to disallow any host key combination (4.0.6 regression; bug #8793)
 * 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 (bug #8755)
 * SATA: fixed guest disk corruption under rare circumstances (only relevant for guests with more than 2GB RAM; bug #8826)
 * Storage: fixed data corruption after a snapshot was taken with asynchronous I/O enabled (bug #8498)
 * Floppy: several improvement
 * HPET: another fix for time jumps (bug #8707)
 * 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 (bug #8363)
 * Shared Folders: don't stop mounting the other valid folders if one host folder is inaccessible (4.0.6 regression)
 * Linux Additions: check whether gcc and make are installed before building kernel modules (bug #8795)
 * Solaris Additions: added support for X.Org Server 1.10
 * Guest Additions: fixed inappropriate Guest Additions update notification when using vendor-specific version suffixes (bug #8844)

[=#v6]
'''!VirtualBox 4.0.6''' (released 2011-04-21)[[BR]][[BR]]
This is a maintenance release. The following items were fixed and/or added:
 * 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

[=#v4]
'''!VirtualBox 4.0.4''' (released 2011-02-17)[[BR]][[BR]]
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/hostfloppies''
 * VBoxManage: fixed ''storageattach'' for host DVD drives and host floppy 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

[=#v2]
'''!VirtualBox 4.0.2''' (released 2011-01-18)[[BR]][[BR]]
This is a maintenance release. The following items were fixed and/or added:
 * 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

[=#v0]
'''!VirtualBox 4.0.0''' (released 2010-12-22)[[BR]][[BR]]
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