VirtualBox 4.2.0 is now available for download.What’s new in this release?
Improved Windows 8 support, in particular many 3D-related fixes
GUI: VM groups
GUI: expert mode for wizards
GUI: allow to alter some settings during runtime
Support for up to 36 network cards, in combination with an ICH9 chipset configuration
Resource control: added support for limiting network IO bandwidth; see the manual for more information
Added possibility to start VMs during system boot on Linux, OS X and Solaris; see the manual for more information
Added experimental support for Drag’n’drop from the host to Linux guests. Support for more guests and for guest-to-host is planned.
Added support for parallel port passthrough on Windows hosts
Enhanced API for controlling the guest