There were two very unusual wheel issues this summer. The first was a bent rim due to me lugging people around on my mountain rack. A 140 pound friend was the butt that broke the wheel's back.
The other strange break was Jess's wheel, which suddenly seized when she was riding. A close inspection reveals somethin's going on in that wheel. No idea how.
But through all of this, I discovered a better bike shop than I was previously frequenting - Pedal Pushers: http://pedalpusherbikeshop.com/