Hi, My macbook pro cd drive seems to be acting up. It doesn't like to read any of my burnt cd/dvd-r, but it reads 'proper' and blank DVDs just fine (by 'proper' i mean like DVD movies, Apple Tiger OSX dvd, and such).. The discs that it refuses to read are fine, no scratches or anything. It takes the disc in, spins and tries to read it for about 3 times and spits it out. I've tried using those DVD lens cleaner discs with brushes on them.. but they didn't help. I've also tried resetting my PRAM (and the other one where you hold the power button for 5 seconds while shut down), and that didn't help either.. If it matters, my superdrive details are: MATSHITA DVD-R UJ-857D: Firmware Revision: KCV9 My machine is bit over 2 years old, so it's no longer on warranty/AppleCare. Has anyone encountered this before?