VirtualBox v3.2.6 Final is released. VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.

VirtualBox v3.2.6 Final Changelog:
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

Download: VirtualBox v3.2.6 Final
Source:Here