Hi everyone, I love my new MBA Rev.b, but the I hate the creaks when I pick it up to type on the lap. And it's all coming from the right side of the body. I believe this is due to the bottom cover not sitting flush with the main body. I tried to tighten the screws there to no avail. When I pinch the right corner there is a bit more play that there is on the left, but the screw doesn't go in any tighter. Is this normal? Thanks!