Lately my superdrive has been acting up. I would put a CD or DVD in and it would rev up a couple of times, then immediately eject. I took it to the apple store tonight and they decided to replace it. 30 minutes later, I was on my way. I just got home and the same thing is happening. I put the media in, it revs a couple of times, and then ejects. I'm pretty sure they actually put a replacement drive in, because this one sounds slightly different (upon boot up, inserting discs, etc.). Anybody else experience anything like this? I'm heading back to the Apple store tomorrow, but it seems strange that the exact same thing would happen to two different optical drives. Could it be software related? MBP 2.2 intel 15"