I installed LXDE, and now every desktop's taskbar except for GNOME classic and itself looks completely messed up. The interesting thing is that it almost looks as if the two desktop enviroments have tried to load at the same time. HOWEVER, when I take a screenshot, everything looks normal. The window manager is okay, it is only the taskbar and menu.
32 bit Linux Mint 12 with
Cinnamon, GNOME 3, and LXDE installed.