I've searched and searched.. I bought my 15" rMBP on August 31. In addition, I bought a TB display, Airport Extreme, Apple TV, Magic Trackpad, Keyboard, and lord knows what else. In all, I spent just over $4,000. I started noticing the creaking on my MacBook right away, but was in fear of returning it because I had a perfect Samsung screen and thought that its clearly a widespread problem not effecting performance so I let it go. Now though, the creaking is getting worse and I'm reminded of how disappointing this is, not to mention frustrating. $4,000 on a computer package, and it better be PERFECT. In addition, I bought AppleCare. My question is, what will they do about this? Fixing it is a fine solution for me - like I said, everything else is perfect. But, do they even know what the problem is?