So, when I pick my macbook pro up, which is less than 3 months old, and I put a little bit of pressure on the bottom right corner just under the middle screw, I head a cracking noise. It is not the metal against glass noise that other people have complained about, because I have that too and I know the difference. It is a cracking noise. It happens mostly when my computer is on, but also sometimes when it is off. What could the problem be?