I got my iPhone 4 in July and 3 days ago the sleep/wake button got jammed. I made an appointment and went to the Apple Store and they gave me a replacement. On this replacement, I'm noticing a yellow tint that my other iPhone 4 didn't have. It's not that big of a deal and I'm not going to go make an appointment to get another replacement because of this but I'm just wondering, does it go away? I remember something being said about the adhesive that's used to hold the screen on not being fully dried, but this is a replacement iPhone and I've heard that they're usually refurbs.