I have had my black MacBook for over a year now, and it has been plagued by several small problems. When recording video on the iSight camera I always get a buzzing feedback (noise) when replaying the recorded video. My MacBook makes an audible humming noise that has nothing to do with the hard-drive or the disk drive spinning. And recently, a fairly sizable chunk of the right palm rest and part of the corner of my macbook has managed to come off. My MacBook is under AppleCare, out of curiosity, is there any way I can get Apple to replace the whole computer instead of just the top case? Thanks in advance!