So this is quite odd. Just installed iOS6 on my iPad2 and almost immediately noticed that there is some weird image ghosting coming thru from other apps (more specifically, the previous app used). I noticed it when I opened the game Pocket Planes by NimbleBit. This game has a dark grey border around it and that is where I noticed that I could see the top tool bar from Safari (which I had just been using). It is also noticeable in another Nimblebit game I have (Tiny Towers) which has the same grey border. I am quite certain that this was not happening prior to iOS6. I am trying to find other apps which have dark edges/borders to see if it affects others as well.