Originally Posted by
Banzai
If I play around with the shifting; up down and back again, sometimes it will settle. It does alright if I only pedal gingerly. Really, really gingerly. And no, I don't shift under load.
This sounds familiar to me. I had a similar problem with my Nexus 7 speed hub. Turned out the problem was the shifter cable. It was too long and, rather than shorten it as I should have done, I did a loop with mine. This caused there to be resistance between the internal wire and the housing, most likely in the loop area, and hence tension between the shifter and hub to be much different causing problems.
Is your cable too long? Do you loop yours? A straighter connection may solve your problem.