Oracle today released VirtualBox 4.1, a new major release. Introducing VM clones, this mean the ability to clone virtual machines via the GUI and VBoxManage.virtualbox the New Advanced wizard for creating new virtual disks and virtual disk copy also for 64-bit memory limit is up to 1 TB. For guest Additions, status of modules and features can now be queried separately by the frontends, Experimental support for PCI passthrough for Linux hosts