For some reason VirtualBox-4.2 required nVidia drivers as a dependency. When I did my update it installed the nvidia binary driver and subsequently caused compiz to crash because it saw the driver but couldnt find the nonexistent hardware. I was able to resolve the issue by uninstalling anything nvidia, which removed virtualbox-4.2, and then reinstalling virtualbox-4.2 which, oddly enough, didnt have the nvidia dependency anymore. I did all of this via aptitude (sudo apt-get aptitude) from tty1 (CTR+ALT+F1). Upon reboot all was right again.
For some reason VirtualBox-4.2 required nVidia drivers as a dependency. When I did my update it installed the nvidia binary driver and subsequently caused compiz to crash because it saw the driver but couldnt find the nonexistent hardware. I was able to resolve the issue by uninstalling anything nvidia, which removed virtualbox-4.2, and then reinstalling virtualbox-4.2 which, oddly enough, didnt have the nvidia dependency anymore. I did all of this via aptitude (sudo apt-get aptitude) from tty1 (CTR+ALT+F1). Upon reboot all was right again.