VirtualBox v4.0.0 Beta 4

VirtualBox v4.0.0 Beta 4 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 v4.0.0 Beta 4 Changelog:
Audio: fixed memory corruption under certain circumstances
3D support: fixed OpenGL support for Windows 2000 guests
Settings: modifying VM session could lose disk attachments (4.0 Beta 3 regression)
OVA: fixed crash during import
GUI: better OS type string matching
GUI: fixed redraw problem on X11 guests with multiple monitors attached (Mac OS X hosts only)
GUI: remember last directory in file dialogs
Settings: fixed .vbox file format portability issue with snapshots (backslashes)
ExtPacks: fixed installation on certain Linux hosts (e.g. openSUSE)
ExtPacks: require sudo for installation on Linux and Solaris hosts
Storage: fixed possible crash during suspend
Storage: fixed raw disk access on OS X
Storage: lower the CPU usage for low disk I/O bandwidth limits
Storage: added multi-attachment image mode for shared disk clusters
Storage: fixed SATA activity LED handling
2D: fixed seamless mode when 2D is on for Mac hosts
Additions: fixed incompatibility with SLED 11

Download: VirtualBox v4.0.0 Beta 4
Source: Here