I bought my new MBP a about 10 days ago and i am very happy with it. The only problem i have is that the hard drive (it seems) is click every few mins, i would guess every 8 mins or so. I would normaly have the laptop sitting on my desk while i am on my PC and i would hear something like "click click click click click, beep". I called my friend who owns the same model laptop as i do and he said it was normal his did it as well, he also stated that it only happens when the laptop is flat on the table. I did replace my laptops hard drive with a 500GB western digital hard drive, i thought that was the root of the problem but my friend did not replace his and he has the same problem. Does anyone know how i can fix this or is it harmless? Thanks.