hi everyone. I have a 13" unibody MBP, had it five months now. I just noticed that the bottom of the case (the seam where the bottom screws in) is starting to separate from the top. I checked all of the screws and they are all tight. its to the front of the superdrive, you can just about see it and you can definitely feel it if you run your hand over it. is this something that I should be worried about, I have the applecare plan so should I call apple about it?