Not sure why but I'll close everything out and restart it...about 40% of the time it'll look like it's trying to boot up but just go to a gray screen with that little circle at the bottom and just stay there. i end up having to power it down completely and power it back up just to get it back on. This happened with my powerbook as well pretty often. Any ideas why? At first it seemed like it was when I disabled the wireless card it did it but I kept restarting it with it off and it seemed to work normal.