OK, I just put a new chain (ultegra) on my triple. I've used a super link and it's the same length (# links that is) as the old chain. However, when in the bigger rear gears and the middle front ring, the chain wants to down shift into the small front ring. I can only keep the chain in the middle front ring when in the middle or right side of the rear cassette.
Any thoughts? Worn middle ring or possible mis-alignment?