After waiting for a tablet with adequate display resolution, I'm finally planning on taking the plunge this weekend. Going to pick up a new iPad and wanted to know if there's any sure signs of problems once I open the box. Where are you guys seeing the color problems, etc? Are there any specific screens that show such flaws better than others? Like an all white screen, all black, etc? As much as I'd like to take it home for the unboxing, I'm considering opening it up in the store to make sure there's nothing wrong with it. Also, can you tell what the serial number is without opening the box? I'd like to snag a DY version since people are reporting that those seem to have less "issues". Anyway, just wanted to know if there are any sure fire signs that I could observe before even taking it home.