This update for virtualbox fixes the following issues:

- VMM: Fixed a bug in the task switching code.
- GUI: Allow to overwrite an existing file when saving a log file.
- GUI: Fixed screenshot if the VM is started in separate mode.
- Audio: Improved recording from USB headsets and other sources which might need conversion of captured data.
- Audio: Fixed regression of not having any audio available on Solaris hosts.
- VGA: Fixed an occasional hang when running Windows guests with 3D enabled.
- Storage: Fixed a possible endless reconnect loop for the iSCSI backend if connecting to the target succeeds
but further I/O requests cause a disconnect.
- Storage: Fixed a bug when resizing certain VDI images which resulted in using the whole disk on the host.
- EFI: Fixed access to devices attached to SATA port 2 and higher.
- API: fixed video recording with VBoxHeadless.
- API: Don't crash if there is no graphics controller configured.
- VBoxSVC: Fixed several memory leaks when handling .dmg images.
- Solaris hosts: Fixed a crash on hosts with certain CPU configurations.
- Windows hosts: Properly fall back to NDIS5 on pre-Vista hosts on silent installations.