I'm gonna take a W.A.G. and say that if they put a BB in that is too long, It may have caused the front der to reach the outer limit of movement before it reaches the position where there is no rubbing in the big/little combo. By tightening the adjuster screw a little more and then shifting, you place even more force trying to get the der to move when it's already at the limit, which it can't and something has to give. In this case the cable.
You mentioned that they (the LBS) claim the der is at a wierd angle. That reinforces my suspicions that the BB is the wrong size. From the pics it looks to me that the der is at the limit of its travel.
How did it shift before they replaced the BB?
Last edited by Trek Rider; 08-24-04 at 09:32 PM.