VirtualBox 4.1.18.78361

# The following items were fixed and/or added:
* VMM: fixed VERR_REM_VIRTUAL_CPU_ERROR under rare conditions after the guest has been reset
* VMM: fixed host freezes with 64-bit guests on 32-bit Linux hosts
* VRDP: added a workaround for rdesktop clients not properly updating the screen size when minimized
* AHCI: fixed a rare bug which can cause a guest memory corruption after the guest storage controler has been reset
* NAT: another attempt to fix crashes under rare conditions (Windows hosts only)
* Mac OS X hosts: addressed issues running Leopard / Snow Leopard
* Linux hosts / Bridged Networking: fixed the problem with device driver unloading on kernels 3.2.18 and newer due to an invalid reference counter
* Linux hosts / guests: Linux 3.5-rc1 fixes
* Linux Additions: the guest content was sometimes not properly updated
* Solaris Additions: installer fix for X.org Server 1.11 and 1.12