JRA. Seriously. Strangely, the guy that owned my MX before me had the same thing happen to him with a Chorus RD, also JRA.
Even at my cost, Campy is god damn expensive. So...time to jump on the SRAM train.
PS - seriously, I was doing a dirt road ride. And no, it wasn't a limit screw issue.
PPS - I love looking at it. The bolt and pulley wheels are on 3 different planes.