I'm hoping someone may be able to shed light on what is happening here.
I carefully center the calipers so that each pad is equidistant from the rim, go for a ride and they're off center again. Only happens to the front brake, not the rear. Wheels are pretty solid Mavic Ksyrium Elites and the rims are true.
At first I thought it was the centering adjustment screw turning because the pull forces go through the screw, but I've loctite'd it and the caliper still goes out of line. There don't seem to be any obvious forces that would tend to push it out of line. Bit puzzled really.