Making sure the Q/Rs are tight is obviously important. I always tighten the top Q/R first (having set the seat height) then put my weight onto the seat as I close the bottom Q/R. This ensures that both parts of the frame are pushed tight with each other. I don't know if this makes much difference but it keeps me happy! The Swift is such a great little bike I hope the cases of frame failure are isolated ones. It will be interesting to hear what Xootr have to say about the subject.