aww my macbook core 2 duo has gone yellow again. I bought it about 6 weeks ago and then it started to go yellow so I took it to an Apple Store, they replaced the case and then I got it back about a week ago and once again its already started to go yellow around the palm rests. I didnt think the Core 2 Duo MacBooks had this problem and I thought it was only a few of the MacBooks which had this problem. This is sad Is there anything I might be doing to cause this ? Its frustrating, I always seem to have the worst luck with things. Since its happened for the 2nd time would they most likely replace the actual MacBook or just the case again? Because if it happens a 3rd time I'll be awful distraught. Thanks a bunch in advance!