I was sitting in class the other day (tuesday) taking notes and messing with dreamweaver when all of a sudden my powerbook kept wanting to go to sleep. I was able to wake it up but it wouldn't stop. I thought maybe the battery was low but it said like 45min left or so. I figured it was a fluke and went home. Later that night after I had plugged it into AC Power it still kept wanting to sleep. I woke up yesterday and could not get it to wake up at all. I called Apple and while I was talking to them I looked over and it had woken up. They suggested re-calibrating the battery and resetting the power management. I tried the second option with them on the phone. It was fine for a while but the same thing is happening this morning. Right now it has stayed awake so I could type this but does any one know what is going on? Also when at home it is closed and plugged in to an external monitor. Thanks!