The challenge of high technology! Today during a ride I came upon a roadie who had stopped and was looking at his bike. I asked him if everything was OK, and if he needed any tools. He said his rear wheel felt loose and he had just figured out the problem with his $6000 Cervelo carbon-fiber race bike (he told me the price, I'm not guessing) -- the chainstay on the derailleur side had cracked and was beginning to separate! His wheel was floating around and the tire was all chewed up from rubbing. I gave him directions to the nearest exit from the park path system. He had a long walk in his super stiff roadie shoes!
I guess the higher the technology, the greater the need for superior quality control.