gracevich - I think there is a fan in the top of the door and venting on the bottom of the door. So the convex shape of the door allows better air flow. If the door was flush, there wouldn't be any airflow.
hmmm...how important is ventilation? i wasn't planning on providing ventilation. M1 (and other components) in a swb is that is closed 99% of the time. am i setting myself up for a problems?