I went to a nearby Jamis dealer to get fit checked, and after working that out (30 deg bend in knee at lowest pedal point) the shop owner pointed out that my frame is cracked on the head tube just above the left side of the top tube where it joins the head tube.
I don't have a pic now but eventually I can post one...
He told me he knew where to look because another customer had come in with the same issue in the last month or two.
I'm hoping that the replacement frame has V-brake mounting posts, because that's what my bike came with when I bought it in Jan 2004. The shop guy said Jamis may not have a frame with V-brake mounts
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