My mac mini just froze on me. I forced quit safari and restarted it and all my settings were gone-my bookmarked sites. So I shut down computer and when I restarted everything I ever put in it is gone! My Itunes music library-tons of music, my documents, everything! The only weird thing is I had access to my pictures. Mom suggested I shut it down for several hours which I did, then the pics were there but I can't open them-they are grey icons. HELP!!!!!