Hey all, I just got my REPLACEMENT rMBP for the same issue. There is a creaking/squeaking noise that occurs when I move the computer around a little bit or press down. It's an intermittent issue that never seems to happen when someone from Apple is around, so they finally broke down and gave me a replacement. This replacement has the same issue and more (squeaking brightness key). My question for you guys is: would you get another replacement by sending it in for 3 more repairs or return it and wait a few months?