I've heard of broken Fritschis as well - mostly early generation Diamirs(several known problems) and recent Freeride users who ski them like they were an Alpine binding and huck big. Given the dominance of Fritschi in the AT binding market, and how few people use Dynafits in general(especially on piste), I'm curious if these statistics/impressions may change.
Oh, and you can put brakes on a ski wider than 85mm with Fritschis, not Dynafits.