So i recently purchased an Ultegra 10sp RD-6600...rear derailluer. It was working fine untill today when it broke. The cage broke off with out any warning. I have a 12-25 cassett which the short cage derailluer is compatible with, and everything was tuned properly. and ontop of the really sweet 90$ piece of metal i now own instead of a derailluer, it bent one of the spokes on my new wheelset. Does any one have a suggestion on what i should do to get compensation for this? I'm deffinantly sending a letter to shimano, and i'm guessing its about time i try out campy.