Faulty guitars ruining ‘Rock Band’ for early adopters?

Reports of faulty guitars have lighted up the gaming world. Chalk it up to the squeaky wheels (or in this case, squeaky strum bars) being the ones to post fervently online, but know of three "Rock Band" guitars personally that are not functioning properly. From talking to friends who own the game and a source we spoke to on the phone today for a story about "Rock Band," problems are emerging: either the strum bar doesn’t register the notes you’re playing, registers them too often, or the "Overdrive" tilt mechanism doesn’t work at all.