Hey all I picked up a 4G last night as an upgrade to my 3G. Great upgrade, love the screen. As a photographer, I love the clarity. I'll probably have to exchange it though due to a stuck/dead pixel in middle of screen. I've read you can't see the pixels on this retina screen, but it's there. Maybe I just have good eyes. I'm also seeing what looks like a faint stain under a small part of the screen -- not yellow, but greyish. If I scroll through a white page, I see it. Have issues like this been reported before? I'm going to exchange it if I can, but figured I would ask if others have seen this, so I am able to communicate the problem more clearly with the apple genius.