I have a 12" Rev. D PB with the superdrive, and I just noticed this. Went to burn a CD and when I pushed the disc in, I didn't get any grabbing motion from the drive. The CD just kinda went it and sat there. I was able to pull it out and tried again, same thing. I also noticed that the "eject" button on my keyboard doesn't bring up the icon on the screen like it normally would. I've tried a couple different CDs and the same thing happens each time. Anyone have this problem or hear anything like it? Thanks, Jake.