3g back not lined up correctly?

[refused]

I purchased a black 16g on July 11 and noticed that the plastic backing was not lined up perfectly with the chrome, however, this was a small problem that wasn't noticeable and didn't effect the functioning of the phone. Yesterday I ran my finger over the spot, and it seems as though it has gotten worse, although still not visually noticeable. I am wondering if anyone else has had this problem, and if so what did you do? I made an appointment at the genius bar for tomorrow and am curious if they will swap it out for a new one, ship it in to get repaired, or simply dismiss me as being anal.