I bought a rMBP 15" off Best Buy's open box lineup locally. I have tried the checkerboard website to test my LG screen for IR and notice that if I keep the screen on the checkerboard for 5 minutes, then switch to the grey I see the screen retains the faint outlines of the checkboard for just over a minute or so. When I use the rMBP normally, ie. not looking for image retention, I see no issues at all, unless I get to a site or screen that is primarily grey. I was transferring some files the other night and switched over to Safari and it was still on the grey background website and faintly saw the folders and open windows from the main desktop. If I minimized them and had my standard desktop image, however, I see nothing. So, with this, I don't "really" see any IR in normal use. Is this something to just live with? I have 60 days to return the computer to Best Buy, but I know if I return it I won't get a good deal on a new one as the one I have. If I decide to keep it and it gets worse, I do have 1 year to play the Samsung screen lottery with the Apple stores here in Vegas. I guess I'm torn on keeping it and using it ignoring possible IR interruptions on a grey screen if for some chance I happen upon one. Or maybe the IR gets worse and I start seeing it in other colors or background colors. Who knows, I don't and this is why I'm asking opinions on the situation. Thanks!