OnTheWay writes "There are an increasing number of reports on the Apple discussion boards that the recent SuperDrive Update 2.1 leaves the drive non-functioning. Users report various issues, such as drive's failure to "pull in" the disc, failure to read certain formats (i.e. DVDs but CDs, or vice-versa), etc. On my Intel Macbook, I can't read data DVDs now, but retail movie DVDs work fine.
Problems seem to be affecting MacBooks and MacBooks Pros, but not the Intel-based desktops. See the MacBook discussion subforum on optical drives here."