Um, going from memory, Marks Dock's are wired the same as the Car Sleds (in requards to audio output) so it seems strange that it works in the car and not in the Dock.

Is it possible that pressure of some kind is causing a short on that channel when it's in the Dock ??? If thats is the case, I wouldn't be keen on using it at all, just incase some of the electronics burns out which could be a much bigger problem than just replacing a broken connector.

If it's just the connector that is broken I'm sure its something we could solder back on between ourselves

Cheers

Cris.