I replaced the chain and 9 spd. cassette on my commuter prior to the start of the riding season, some 273 miles ago. I shortened the new chain to match the length of my old chain link for link.
It was a slow start to the season and I've only really started putting any amount of miles on the bike over the last few weeks. Being that my fair weather commuter is a SWB recumbent, it took a while for my "Recumbent Legs" to get back into shape. Now I'm basically back up to speed on the bike.
Over the past couple of weeks I've noticed that occasionally the chain tends to skip a bit. It starts to shift off of the sellected gear on the cassette then reseats itself. This only seems to occur once every three or four miles.
Based on the above information, who can solve my problem? Feel free to ask me for any further details, I will answer them.
You may be suprised to see what the problem turned out to be. I'll verify if anyone is astute enough to figure this out, otherwise I'll post the fix in a few days.