Hi guys, I just got a brand new 2.5 Penryn MBP and am loving it to bits. However, there's a strange 'crunchy' sound when I insert a CD or DVD into the super-drive. It sounds a bit like it's turning a bit too far and you hear a sort of 'one click too many' sound from it.. as if you turn a cogwheel a bit too far. Anyone else recognize this problem? Something to go back to the Apple store for? I'd like to hear your thoughts. Thanks in advance!