- File-level reporting
- Bugfix: In case a selected file was deleted and then its folder was collapsed, an error could occur if no other file or folder was selected.
- A few minor improvements have been incorporated.

- Added native 64-bit support.
- Added support for exFAT drives.
- Improved Windows 7 support.
- Fixed browse issue with the Wizard in Win98.
- Fixed a few other Win98 issues.
- Minor UI tweaks.

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
Support for OpenGL 2.0 for Windows, Linux and Solaris guests

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: fixed guest PAE
Linux hosts: kernel module compile fixes for 2.6.31 (bug #4264)
VMM: fixed 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: fixed 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: fixed hanging and unkillable VM processes (bug #4040)
VMM: fixed 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: fixed rare hangs when open the OVF import/export wizards (bug #4157)
3D support: fixed VM crashes for client applications using incorrect OpenGL states
3D support: fixed memory corruption when querying for supported texture compression formats
3D support: fixed incorrect rendering of glDrawRangeElements
3D support: fixed memory leak when using VBOs
3D support: fixed glew library detection
3D support: fixed random textures corruption
VRDP: support Windows 7 RDP client
Networking: fixed another problem with TX checksum offloading with Linux kernels up to version 2.6.18
NAT: fixed “open ports on virtual router 10.0.2.2 - 513, 514” (forum)
NAT: allow to configure socket and internal parameters
NAT: allow to bind sockets to specific interface
PXE boot: significant performance increase (VT-x/AMD-V only)
VHD: properly write empty sectors when cloning of VHD images (bug #4080)
VHD: fixed crash when discarding snapshots of a VHD image
VHD: fixed access beyond the block bitmap which could lead to arbitrary crashes
VBoxManage: fixed incorrect partition table processing when creating VMDK files giving raw partition access (bug #3510)
VBoxManage: support cloning to existing image file
OVF: several OVF 1.0 compatibility fixes
OVF: fixed 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 file was created using the wrong permissions (2.2.0 regression; bug #3785)
Shared Folders: allow to change file attributes from Linux guests and use the correct file mode when creating files
Shared Folders: some content was incorrectly written under certain conditions (bug #1187)
Shared Folders: fixed incorrect file timestamps, when using Windows guest on a Linux host (bug #3404)
X11 clipboard: fix duplicate end of lines (bug #4270)
X11 guests: a number of shared clipboard fixes
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: fixed error handling for some USB dongles
Web service: fixed 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, fixed
Web service: added support for IDisplay and IGuest interfaces, which were previously unavailable
Registration dialog uses Sun Online accounts now

- Added U3 smart drive support. (Separate installer)
- Added support for: Adobe Reader 9.0, Adobe Photoshop CS3, Adobe Photoshop CS4, Adobe llustrator CS4, Nero Burning ROM 9, OpenOffice 3.1, AVG AntiVirus 8.0, AntiVir Desktop and Vuze.
- Added Installed date and size to Uninstall Tool.
- Added support for multiple item selection on Start up tool.
- Added support for cleaning Windows 2008 IIS log files.
- Improved Windows 7 support.
- Improved 64-bit Registry cleaning accuracy.
- Improved loading of System Restore Tool.
- Improved various routines in the uninstaller code.
- Fixed Windows 7 Task Scheduler bug.
- Fixed “No Disk” bug when using Wipe Free Space.
- Fixed Win98 support.
- Minor text and translation improvements.
- Minor bug fixes.

Bugfix: In some cases the root folder in TreeSize was not expandable.

- Added custom drive map colors (Options > General > Interface).
- Fixed schedules for multiple drives.
- Fragmented info is now displayed in df.exe.
- ‘Large files’ can now be excluded from freespace defrag (Options > Defrag > Advanced).
- Improvements to the way crash data is collected.
- Various minor UI tweaks.
- Several minor bugs fixed.

- Yahoo Protocol 16 support, including new HTTPS login method; this should fix a number of login problems that have recently cropped up. (Sulabh Mahajan, Mike “Maiku” Ruprecht)
- Only display the AIM “Unable to Retrieve Buddy List” message once per connection. (Rob Taft)
- Blocking MSN users not on your buddy list no longer disconnects you.
- When performing operations on MSN, assume users are on the MSN/Passport network if we don’t get network ID’s for them.