This guy has theories on the cause such as extreme castor, combined with rubber bushings, which could make the front wheels do a "shopping cart wheel wobble".

Could the "bounce" problem, cause the camber to fluctuate enough to do this damage? hmm

http://www.lasercannon.com/Newz/feathering.htm[/URL]

http://www.lasercannon.com/Newz/frontsuspension.htm