I got a late 2008 MBP and recently my logic board got exchanged due to my graphic card failure. However, since the work is done, a very annoying problem occurred. When I put my hand on my palm rest (right side, the hard ware side), it sounds like I am squeezing the whole thing down and it will make some very wired noises. It sounds like cracking or sth. I bring it in apple store twice and they said they do not hear anything. Anybody have a idea about this issue? Thank you very much.