Gotta bump this one, because the chain-skip problem is back!
Thought Powers2b's freehub pawl diagnosis was spot-on, as I actually started to get some noise from back there while coasting. Took the thing apart and found I had a cracked freehub body (!).
Well, now that's replaced with a new freehub, and everything was running just great--until the rains came. Now the chain's started slipping again if I'm starting up or coming upon an incline in either of the two smallest cogs (it's a 13-25 9-speed cassette--Campy). This happens whether I'm in the big ring or the middle ring up front.
Did I mention this only seems to happen when it's rainy? What's going on here? I clean & lube regularly, weekly in the rainy season ("ATB" II lube).
Help?