Well, bought this MacBook Pro Retina a couple weeks back, but it seems to be defective! It ghosts quite easily, actually (and fast!). If I put up a blank blue wallpaper, and minimize this window, I can actually still make out the "everythingiCafe" logo at the top! It seems to stick temporarily, which is good, but I'm definitely bringing this to the Apple Store to have them take a look at it. My old 2011 MacBook Pro did not have this issue. Anyone else seeing similar issues?