My MBP i about 5 weeks old now and I have been very very careful to make sure it stays in great condition. I have noticed since early this week that a strange greyish discoloration has started to appear on the right side of the screen bezel. It is about 1/2 an inch in length. In addition to he obvious reason why I would be somewhat displeased and concerned, is the fact that almost the exact same thing happened to my powerbook, but it only happened after several years of use so I didn't think too much of it. I have attached a picture, but because it is metal it is really hard to take a decent picture that actually shows the streak. I would really appreciate your comments on whether you have had a similar experience or thoughts on what could be making this happen.