My screen flickers and goes black! It stays black and flickers like it wants to come back on and can't. Finally the screen returns to normal. It does this when it wakes up and at random times while I'm in the middle of something! Really frustrating.... I also have those gray smudges that some of you wrote about. I wonder if it's connected with the black screen and the flickering? I'm some distance from a store with a genius bar, my warranty is up this coming August. Guess I'll soon be taking a drive!