I searched other threads about this and havent found anyone who has this exact problem. After using my iPhone 3G for a couple of minutes, the bottom left and/or right sides of the screen will get a faint yellowish tint to them. It's most noticable on a completely white background. The funny thing is that it's very inconsistent... sometimes it's there, sometimes not, and it varies between bottom left or bottom right of screen. This is my 3rd iphone 3G replacement and I'd rather not venture back to the Apple store. What do you think?