I am running
Linux Mint 14 with
Cinnamon desktop environment. After automatically applying upgrades from update manager and restarting the system, Cinnamon UI is broken. Unfortunately I don't remember which files were upgraded.
All windows lost their title bars and also the lower menu bar is gone and it doesn't activate on mouse hover. The glxgears program is working so I assume that OpenGL is fine. Is there any way I can revert to the state of my machine before my last click that did the upgrades?