Hello all, I had a hunch that this would only be a matter of time, and sure enough, it's happened. My November 2009 MacBook has officially begun to crack in a few areas on the case. The main cracking is on the rear of the computer where the hinge connects to the screen. There is also one crack beginning to form on the left side of my palm rest area. I wonder if apple will provide free replacements for this model as well. This makes me believe apple should just get rid of the plastics altogether.