virtualbox.org

Please do NOT use this VirtualBox Beta release on production machines. A VirtualBox Beta release should be considered a bleeding-edge release meant for early evaluation and testing purposes.

You can download the binaries here.

Please do NOT open bug reports at http://www.virtualbox.org/wiki/Bugtracker but use our VirtualBox Beta Feedback forum to report any problems with the Beta. Please concentrate on reporting regressions since VirtualBox 4.0.10 / VirtualBox 4.1 Beta 1.

The following items were fixed / added since the VirtualBox 4.1 Beta 1:

• VMM: fixed a Beta 1 regression which prevented certain guests from booting
• VMM: better out-of-memory error reporting under certain circumstances
• GUI: display CPU cap in the VM details page
• WDDM: serveral fixes
• Storage: fixed possible data corruption under certain circumstances with VHD and Parallels images
• Storage: introduced non-rotational flag for hard disks for optimizing the performance with modern guests (e.g. Windows 7 will not automatically defrag the disk)
• Floppy: make unmounting a host floppy disk work
• Guest control execution: fixed documentation + syntax diagram.
• Solaris hosts: Host-only/Bridged networking fixes
• Solaris guests: fixed automounting of shared folders
• Linux installer: fixed compilation of the vboxpci module if DKMS is not installed
• Windows Installer: fixed automated VBox Python API installation.
• Windows hosts: fixed a BSOD in the new USB code under certain circumstances
• Windows hosts: use Qt 4.7.3 including Oracle certificate
• Experimental support for PCI passthrough (Linux hosts only)
• Sources: fixed USB 2.0 support for non-official builds
• Documentation fixes