Well i'm new in this site and i have some problems with Ubuntu 12.04
I made a clean installation and install gnome 3.4, gnome classic and cinnamon but when i want to run gnome tweak tool in gnome 3.4, it closes immediately, in Unity, Cinnamon and gnome classic it runs perfectly.
Also I always receive a warning about Ubuntu crashed and sometimes it reboots Can you help me in this?