She didnt offer to replace it or you didn't ask?
Mine has a slight rattle with the sleep wake button but if I were to gently push it to one side, it'll stay in place and won't rattle. That is, until I press the button again..The rest of the phone is perfect so I'm not going to risk trading it in for a different (possibly worse) problem.
Yeah, I asked if I could get it replaced. She told me she couldn't because it's cosmetic.