A few days ago my powerbook's display went funny... it is almost like a negative effect, but not the actual negative effect that you can do by pressing "ctl+alt+com+8". The other odd thing is that is has seemed to get a little better in the past day or two on its own. I have attached a picture (the problem is best seen in the upper left portion of the display although this problem does cover the entire screen). Does anyone know if this is a fixable problem? Thanks so much for your help.