I've had my 3rd gen iPad for a little over a week now. Everything seemed fine when I gave it a once over on the day I bought it, but today I noticed some dead pixels near the center of the screen. I did a dead pixel test to see if there were others and I found several more in other areas of the screen. I could have sworn they weren't there before but maybe I just wasn't looking hard enough. I will without a doubt be exchanging this unit, but I was just wondering if dead pixels sometimes develop over time? I will thoroughly inspect the next unit, and I just want to make sure I don't have to worry about anything popping up over time if it looks fine when I bring it home.