Hi MR folks, I came home tonight to find something I am 100% sure wasn't there before. Trust me, I inspected the screen like it was the end of the world when I got it. It's quite faint, especially through the camera lens, but there is some sort of a stain developing on my Retina screen. I thought it was a fingerprint at first (even though I don't ever touch the display) so I wiped it down - alas, it's still there. It's roughly the size of a dime, right in the middle of the display on the right. I know I'm probably gonna answer my own question - this isn't 'normal' and should be looked at by a Genius Bar associate. But quite frankly, I'm about fed up with their sub-par screens. I went through multiple exchanges due to papyrus bottom half, pretty-in-pink upper corner and black line out of the box. I've escalated each issue at the time with Apple CS. They promised me a full refund if I were to ask for one outside of the 14-day if I am not fully satisfied. Obviously, I'm not satisfied at this point - it's a bit too expensive for my liking, especially since I bought the computer for its screen, not its black keyboard, and it feels like they fall short to deliver. (Or it requires a lottery I am certainly not fool enough to contemplate anymore.) What I'd like to know, in fact, is what might this thing be? Has anyone encountered anything like this before? A pic is attached! Thanks for your help!