I purchased this iMac about a few months ago, and noticed that there was some sort of image retention whenever I would leave my screen on a page for a certain amount of time. It is really frustrating especially when working on projects and such, and I'm stuck with a pinkish overlay of what was previously on my screen. I did an Image Retention test from here: http://www.marco.org/rmbp-irtest.html It says to leave it on for 10 minutes, but I left it on for only 5 minutes. Here are my results: Before: After: The "ghosting" would stay there for about an hour or more. So do you think it is defective and qualify for a replacement? or is it normal and everyone's iMac has it? Also, I have a small dent on the bottom of my iMac. Image here: Will they use this as an excuse for it causing the image retention? I did some research online and people said that Apple uses LCD screens from LG and Samsung. People who have LG screens seemed to be the only iMacs with Image retention problems.