For the past few weeks I've been getting a strange problem with Firefox (ver. 3.0.3) running under OSX. Every now and then the browser starts rendering screens all garbled. The browser continues to function, and I can usually keep using it. The garbled page can sometimes be display correctly is I hit refresh, sometimes not. Another thing that happens is that I cannot "quit" out of the program, I must use force quit. Here are some screen shots:





Any ideas on what is causing this? It seems to happen a lot on Facebook, or after I visit Facebook.