I had my LBS put a new chain on a month or so ago, and ever since have had problems - chain jumping, skipping, dropping etc.
I took a close look today and it looks like a couple of rivets may have have sheared or bent and the chain is definitely sitting on top of the chainring at one specific spot.
Check these pics:
Once every rotation the chain sits up on top of the chainring teeth rather than in them, causing a skip every rotation ... in this vid it happens when the chain meets the crank arm on the opposite side of the bike from the camera.
So BF, please help me - is this a tuning issue, a chain issue, or a chainring issue? Is my chainring FUBAR? Please help! Thanks