VirtualBox v3.1.0.55019 Beta 2 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 v3.1.0.55019 Beta 2 Changelog:
* Fixed snapshots of VMs with empty DVD attachments (3.1.0 Beta 1 regression)
* Fixed snapshots of VMs with multiple attached disk drives (3.1.0 Beta 1 regression)
* GUI: fixed a snapshot in the snapshots widget
* VMM: guest SMP fixes in rare cases
* VMM: fixed kernel panic with older Linux kernels, e.g. CentOS 5.3 (APIC; 3.0.12 + 3.1.0 Beta 1 regression)
* 3D support: fixed Final frame of Compiz animation not updated to the screen (public ticket #4653, partly fixed, needs more work)
* 2D/3D support, Windows: fix gl support test failure when VBox installation path contains spaces
* 2D support: fix saved state restore failure when 2D is active and used by the guest (Playing a Video)
* Creating a new VM sometimes failed (3.1.0 Beta 1 regression)
* VBoxManage clonehd was broken if the same image was cloned concurrently
* added VBoxManage usage information for Floppy/DVD images
* Linux Additions: properly disable the seamless mode if the guest doesn't support it
* Windows Additions: fixed high usage of VBoxService on Windows guests (3.1.0 Beta 1 regression)
* Windows Additions: VBox Credential Provider fixes
* Windows guests: fixed invisible mouse pointer when VM was restored from a saved state.
* VirtIO: performance improvements
* EFI: 32-bpp VGA driver was added.

Download: VirtualBox v3.1.0.55019 Beta 2
Source:Here