i moved my xbox today and when i looked at my power box thingamajig there are a couple openings or slots on it - 2x4 on the sides and same on the back - and when i looked at mine they were FILLED with dust. absolutely caked/clogged. i cleaned them out and have them on the upside now instead of laying down against the floor. hopefully they won't fill up again, we'll see. just a little heads up for other xbonowners out there.