I've got an iPhone 3GS with the yellow gradient on the bottom. It's really distracting me now and I'm wondering if I should return it and try to find one with a better screen or see if Apple releases a firmware fix that cools the screens enough where the yellow won't be as bad on the bottom? I noticed that my iPhone 3G has the same yellowing on the bottom as my 3GS but, the yellow is more prominent on the 3GS. Perhaps Apple can make them match by issuing a software update for the 3GS? It's not as bad on my iPhone 3G, but I do see a blue-ish to yellow-ish gradient going down the screen. Didn't they fix the yellow screens last year with a software update?