I figure I'll post this here since the bug icon in the client is gone.
For some reason, without any devices connected to it, the Microsoft Xbox wireless receiver causes the camera to spin about the character on the ground and the area map to zoom in constantly.
Unplugging the unit resolves the issue, but figured I'd point out that the game client is taking input from the receiver for some reason. I would be interested to see if the game client could in fact utilize the xbox controller for something, but am happy so far with what there is.
I was having a similar issue, though in my case it was not a game controller per se... It was my guitar for guitar hero that was plugged in. The game kept me in a perpetual upward counterclockwise rotation. Very dizzy making but easily remedied once I discovered what was causing it.