VirtualBox v3.2.6 Beta 1 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 Beta 1 Changelog:
This is a maintenance release. The following items were fixed and/or added:
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)
Page Fusion: several bug fixes for SMP guests (including bug #6964)
Mac OS X server guests: compatibility fix
EFI: fixed memory detection for guests with 2GB or more RAM assigned
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)
VBoxManage: fixed storageattach error handling (bug #6927)
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)
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)
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
USB: allow the guest to disable an EHCI port
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)
Linux Additions: re-read a directory after a file was removed (bug #5251)
Windows Additions: automatic logon on Windows Vista/Windows 7 is now able to handle renamed user accounts; added various bugfixes
Windows Additions: improved command line parsing of the installer

Download: VirtualBox v3.2.6 Beta 1
Source:Here