Superdrive

The drive in my macbook won't read store bought music cd's. It will read dvd's (movies, home made back-ups, software, etc.) It will even accept a music cd if I make a copy on another computer then put it in. But it will not read store bought ones. It will spin up three times and then eject the disk...Any ideas?

my new macbook has similar conditions. it will read everything execpt some foreign dvds. it will just eject after 10 seconds. if i keep doing it, it eventually reads. snow leopard, i suspect. i really wish i could just down grade....