P3-24 pitch instability

I'm having some pitch problems with my table. I've cleaned and reoiled the bearing, cleaned the sides of the subplatter and the belt.

But, I noticed that the pulley on the motor shaft is slightly off kilter. I'm wondering if it's enough to cause the pitch problems I'm hearing.

I made a video:
http://www.youtube.com/watch?v=w3_8Xf_QbIA

Or does anyone have any other suggestions?