A new version of the open source VM VirtualBox has been released. VirtualBox is available for different operating systems like Windows, Linux, Solaris and Mac OS X.
Quote: VirtualBox 4.1.8 (released 2011-12-19)
This is a maintenance release. The following items were fixed and/or added:
VMM: fixed VERR_MAP_FAILED during savestate under certain circumstances (bug #7929)
GUI: stop updating the VM status icons when the VM is paused (bug #8368)
VBoxManage: fixed wrong return code after startvm (bug #9642)
BIOS: fixed hang at launch of DOS applications generated by Clipper 5.3 (note that hardware virtualization may be required)
USB: fixed OS/2 boot hang when using recent USB drivers
NAT: increase maximum number of parallel connections making connections with port forwarding more robust (#8471)
Metrics: fixed potential problem with invalid access in guest metrics collection upon VM destruction
Main: don´t crash if a medium is ejected twice (bug #9922)
VBoxSVC: fixed crash under rare circumstances (e.g. client crash)
VRDP: fixed screen freeze (bug #9620)
OVF/OVA: fixed broken disk images on import under rare circumstances
OVF/OVA: better error message when importing corrupted appliances
VMDK/VHD: fixed a possible corruption with host cache disabled when using snapshots under rare circumstances (bug #9749)
3D Support: Fixed fullscreen mode issues for ATI graphics (bug #9775), Windows Media Player rendering for XPDM-based Direct3D support (bug #8341). Multiple fixes to XPDM and WDDM - based 3D support for Windows Guests and for 3D support in general
Linux hosts: fixes for Fedoras Linux 2.6.41 (bug #9948)
Linux hosts/guests: fixes for Linux 3.2 (bug #9743)
Solaris Additions: various shared folder fixes (bugs #9856, #9862, #9917)
Windows Additions: various fixes for Direct3D support (un)installation, added detection of missing or wrong Direct3D system files