Raised metal frame around screen higher on right side.

I am a recent Iphone 3G buyer. I noticed after a few weeks that the metal frame surrounding the screen is higher on the right side than on the left. It isn't flush at all. Occasionally dirt or specks of dust get wedged in along the raised metal frame on the right, and when I slide my finger on the screen from left to right, it feels noticeably higher. Perhaps this is how they are made....and for a reason. A friend with the original Iphone said that on his model, the entire metal frame is lower than the screen, rather than flush. I am curious if others with the 3G have this raised frame issue.
Thanks