http://forums.fedoraforum.org – Running Gnome3 under F17 on an AMD Athlon 64 processor, using the nouveau driver, the display occasionally changes so as to be unusable. It is always when I have multiple workspaces, and usually have multiple terminals open. When it occurs, blank portions of the desktop suddenly contain garbage - sometimes merely stripes but often looking like a portion of a different workspace. (HowTos)