I've had my iBook since December and no problems. I don't know if this is a "problem" or not, but last week I was using my laptop and the screen spontaneously dimmed and a message popped up saying "Your computer needs to be restarted. Press and hold power for several seconds or press the restart button." So I turned if off and restarted it without incident. Then this same thing happened again this evening. I was just curious if anyone knows why it is doing this or if something is wrong. Or maybe my computer just needed a reboot, but it has never happened before and I don't think I've been doing anything differently on it. Thanks in advance!