I noticed that several people had mentioned that their back brakes had started squealing. Mine started squealing at around 500 miles and got to the point where it was driving me nuts. I pulled of the pads and sanded them down a little, getting everything nice and smooth, stuck em back on and the squeal is gone. They didn't appear to be glazed much if any, so I'm wondering if maybe there was a collection of brake dust and dirt caught up in there. Anyway, this kept me sane for now, thought I would share.