I've just noticed a couple specks of dust under my new 3GS screen. They are only really visible in the sun with the screen turned off. I didnt even notice them for the first few days. Is this fairly common or should I try to exchange it? It seems from reading other forums that this is a fairly common issue and chances are good the replacement could be worse (plus I just noticed my iPod Touch screen has some as well). I just thought I would get the opinion of y'all...