MacBook Air :: Small Gap When Screen Closed Down?

When the screen on my MBA is closed down the rubber edge on the bezel around the screen does fit tightly on the left side, but on the entire right side, there is as small gap between the rubber edge and the base of the MBA. At the rear right the distance between the bezel and the base of the MBA is one milimeter and since the rubber edge takes up less than half of that distance, I'd say the gap is at least half a milimeter. Does your screen fit tightly all the way around or is a small gap normal? I'd think the rubber edge not only avoid metal against metal, but it will also prevent dust or dirt from entering the screen / keyboard / touchpad area when transporting the MBA.