I just received my replacement i7 iMac. Originally returned due to backlight bleed in bottom corners and 1 dead pixel. Low and behold replacement backlight bleed/glow is identical to the first one. See attachment pictures... The second picture is for a comparison - what a screen with no backlight should look like- my 'old' Samsung 275t 27" that this iMac is replacing. Anyway have been contemplating returning iMac again for cash back. BUT have decided to keep it for the following reasons: it's so very fast! no dead pixels on this one this screen is actually pretty amazing. On anything but an all black picture, it looks fantastic. Its nice and bright and the resolution is awesome. The poor backlight in corners is a minor trade off if you step back and think about the machine as a whole. Apple support have been very good to me, and appreciated the replacement to put my mind at ease (in a way). Sorry to people that I supported with backlight issues on this forum- looks like I sold out to Apple in the end!