VirtualBox v4.1.6 is released. VirtualBox is a general-purpose full virtualizer for x86/x64 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.

VirtualBox v4.1.6 Changelog:
This is a maintenance release. The following items were fixed and/or added:

VRDP: fixed screen corruption
NAT: the interface stopped working after a lot of failed ICMP requests (bug #9371)
E1000: fixed rare Windows 7 guest hangs, either at boot time or when reconfiguring the network card in unusual setups (bug #6223)
ATA: fixed a possible crash during ATAPI passthrough with certain guests
ATA: improved compatibility with ancient Linux kernels
Main: fixed incorrect framebuffer information after leaving the fullscreen mode with X11 guests, this lead to a scrambled preview window in the GUI for example
Mac OS X hosts: fixed the problem with duplicate packets when bridged to a wireless interface (bug #9648)
Linux hosts: fix for 3D support on Fedora 15 (bug #9799)
Linux hosts: don't call del_timer_sync from an interrupt context (Fedora bug report 746331)
Windows Vista and 7 guests: more WDDM fixes
Linux Additions: fixed kernel module compilation failure on Redhat Enterprise Linux 4 (bug #9709)
Linux Additions: install the DRI driver correctly on Ubuntu 11.10 guests
Solaris Additions: added read-only mmap support for shared folders
Solaris Additions: added directory, file mode and mask options for shared folders
Windows Additions: implemented faster detection of logged-in guest users and stale sessions
X.Org Additions: fixed graphical corruption when switching to a virtual terminal (bug #9490)

Download: VirtualBox v4.1.6
Source: Here