I have the mbp 15' 2.2ghz one. At starting up, there is only few seconds on the blue screen; however, at shutting, the MBP stuck at the blue screen and it doens't turn off! It just goes to sleep with the blue screen and the spinning wheel. I have to press the power button to shut it down. I have performed the repair disk from the installation disk, but no luck, and I even called Applecare for a few times! Everything else on the mbp works perfectly fine. My girlfriend's macbook 2010 never has this kind of problem. I am looking for help on this.