Hey all. I have a stock 2.53GHz 15" Unibody MacBook Pro (Oct 08) this morning when I started her up, she just went into the blank blue screen, and there was the rotating icon at the bottom of the screen. It would loop over and over. The icon would disappear, then reappear in a bit. I know it's not the hard disk, as I just booted into my Boot Camp partition which works perfectly. Anybody know? I'm on the latest snow leopard 10.6.2 if I'm not wrong?