Check bearings and they are both very smooth and the rotor is in one piece. It actually looks/feels like the rotor is rubbing against the windings in the can. I'll clean them right now and take a closer look...
EDIT: Well something is wrong and I can't figure it out.
The thing is that I bet it is something very simple. Unfortunately, my brother went on vacation and took my camera so I can't take pictures right now. I'm probably going to email Mike and see what he can do about it...