it wouldn't surprise me if someone on here has asked before, but search isn't very good. now that the gpu in my ibook is apparently back in working order, i find that it occasionally freezes. it's done it in both x and 9, but typically when using itunes. it has also frozen after booting and then doing nothing. firmware isn't installing, which must mean mine is up to date. i have no idea what could be causing this. i think it's either the gpu overheating from the padding pressing it in place, the system having internal problems, or as my friend suggested the hard drive. this computer did fall off a desk while running, but i've gotten two running systems and half a gigabyte of music on it with almost no problem. any other ideas?