There is a one year warranty on the bumper, take it to apple, if they dont replace it, call apple support they should ship one out to you. Have had a few replaced in store.
Wha!?? That was my #1 complaint about the bumper! And I already replaced my bumper just before the Verizon launch (so, pre-new-bumper) because of my #2 complaint: it gets stretched out because I have to take it off and on because my other connectors don't fit!
Looks like -- if I really want to keep using a bumper -- I should make a plea at the Apple store and then be ready to drop another $30 when they deny me a new updated bumper