Originally Posted by
joejack951
Given the (assumed) fragility of carbon fiber (both on the clamp of the derailler and your seat tube) it could be possible that your LBS is going too safe with the torque they are applying. This in turn is causing the derailler to slip. .
Clamp is still alloy. Also the direction that come with the clamp on FD give the torque specs for the clamping bolt.
It also seems to me that if the FD slipped and turned into the chainring that the much more fragile carbon cage wold break rather than the clamp or that the hinge pin would go before the clap itself.
Might try posting over on the campyonly forum -
http://www.campyonly.com/phpBB2/index.php to see if anyone over there has a clue. I did a quick search but nothing turned up.