my ibook doesnt read dvds anymore like it used to, but it will read blank ones if i use an external dvd drive, but when i try and insert a normal dvd (ive tried a lot of dvds so its not just one disc) in the laptop drive or the external one, it says "The disk you inserted was not readable by this computer." and gives me an option to ignore or eject. i tried creating a new account, but the same thing happened, so i used my install disks to install mac os x on an external drive and booted from that and the disk worked! but, ive got lots of important data on the laptop drive, so im stuck here. if someone could help that would be great. heres some of the more technical information about the laptop: ibook g4 12" with a 1.2 ghz processor and 1.2 gigs of ram, MATSHITACD-RW CW-8123 combo drive, and a 120 gb hard drive