hello, i just purchased a 15" 2.66 mbp. i noticed that if i rest my palm on the right lower side of the computer with the lid open, the computer makes a clicking sound, this only happens when i rest my palm on that region of the laptop, it doesnt produce the sound on its own. is this a problem? sounds like the hard drive. its not a continuous clicking, i place my palm down, and it clicks once, it doesnt happen every time, but about 3-4/10 times. anyone else experience this?