I found another bug. When switching users, the screen will dim when using the default driver. To fix this, you have to install nvidia's driver using
System->Administration->Hardware Drivers. The only problem with this is that your boot splash will be distorted and ugly. A workaround is to comment out #GRUB_CMDLINE_LINUX=" splash vga=x" in /etc/default/grub.
Yup, still ugly. :)