I have an aluminum bike that has developed a creak with every pedal stroke. the LBS bike shop guy has said he thinks its an issue with tolerance b/w the frame and the bottom bracket causing just a slight amount of movement when pedaling. the other possibility is a slight crack somewhere in the frame (or more likely welds).

ive also checked the usual suspects to be sure its not something more simple: the bottom bracket and crankset are brand-spanking new, headset is not loose, seat and clamp are clean, removed bottle cages, skewers, pedals, and even the small eyelets for the internal cable routing. i can also cause the creak by pushing on the frame (lightly) laterally near the bottom bracket, so it would seem to be the issue is caused when the frame is torqued (and nothing else is moving). i have been pretty successful at keeping all of my bikes silent as an assassins, even the mountain bike, and i beat it like it owes me money. the creak is driving me nuts, like a dripping faucet.

assuming that the problem is the frame, do you guys have any suggestions for me? the bike is a 2011 transition elite that i bought brand-used so i dont have a warranty. would contacting specialized lead anywhere? anyway to dampen the sound? my only thought was getting some rubber tape and installing inside the frame to try to dampen the noise, but i am skeptical of this fixing anything.

any ideas would be appreciated.