I bought my new 2011 MBP on Feb. 25, 2nd day they were out. The HDD as it booted was making a weird noise that I never heard before in my 2009 MBP. The light sensor didn't seem as sensitive and it was staying on in places that my 2009 seemed to turn off with the same amount of light. Well, I drove 45 minutes to the nearest Apple Store last night (Feb 28) and got a replacement of a completely new laptop. This one is doing the exact same thing. Are you kidding me?