So I sent in my new penryn MBP 15" 2.5 into Applecare because the screen suffered from that lower yellowing issue. They got it on Thursday and then the next day they called me and told me that an "engineering hold" had been placed on it. The guy said that this meant that Apple engineers wanted to take more time to diagnose the issue and wanted to keep my laptop for awhile. He said I had two options: 1) He could cancel the hold, they would replace the screen and I would get my laptop back or 2) I could give my computer to the engineers and Apple would send me a new one. I BTO'ed my previous one to include the 7200 RPM drive and then purchased 4GB of RAM off of NewEgg, but when I told him this he said that that was no problem and that they would spec. out the new laptop with those same specs. I didn't really have much data on the hard drive yet since I just got the computer, so I figured, sure take it, fix this screen yellowing issue so none of us ever have to deal with it again. Here's to hoping my new MBP doesn't suffer from the screen issue Has this happened to anyone else, or does anyone know if this is really all there is to it?