This evening as I went to load a CD, I found that my SuperDrive on my TiBook would not accept the disc. I tried a DVD and it too was spit out. I tried a CD-ROM, same thing. I repaired permissions, restarted, and tried again. No dice. The drive grinds as if it wants to play the disc, but then, grudgingly, refuses it. As a test, I tried putting the disc in upside down (ink side down), and the drive spit it out even faster. I wouldn't think the drive is old enough to have died, and it worked just yesterday. Any thoughts?