iPhone 3g question

[GazD]

I have recently noticed on my iphone 3g, on the side where the black plastic casing meets the chrome frame, has started to separate. This has also led to particles being on the underside of the screen which is very annoying.

Would I be able to do anything about this such as a warranty claim? If so what would be the best course of action to take?

Thanks in advance.

 

[GazD]

I bought it from the Apple store, so would I be better taking it back to there