Not a huge deal but it's kind of ugly - there is some kind of stain or discoloration on the iPad where the flap holder touches it on the inside back. I checked 2 other iPads that use an Apple Case and they don't have the problem although there's isn't quite as old as mine (3G launch date). I don't keep it in the heat or sun, and I do remove it occasionally (prob. at least once a day). Is this a Case issue, an iPad issue, or what? Anyone else notice this?