I have a related problem, I think. I had much difficulty getting my fold cable (or whatever you call that) upgraded at the LBS. Twice they set up the bike so that the stem hinge was normalized--at 90 degrees. The first time I rode it out, second time I checked first.
Ever since then, though the headset appears tight, the ride has been significantly less tight-feeling. Very, very annoying. My confidence that anyone in town can actually fix this is pretty low; I hope to send the bike back to BF or get it there on a visit at some point, so they can give it a proper going-over.