I'm thinking the same thing that 7rider regarding orthotics. I recently had a PT bike fit done and he found a whole bunch of weird stuff going on with my right side. I was rocking my right hip, my right knee was swinging outward, and my right foot was supinating at the bottom of the pedal stroke. I too, have a leg length discrepancy (right is shorter than left). I've been using an OTC heat-moldable insert by Sole, but it's their slim-design version that is ideal for cycling shoes and other low volume footwear. REI sells them for $45. My fitter approved of these inserts, but also put a Specialized valgus shim into my right shoe to help tilt my foot more inward. It seems to be helping, because I haven't had the toe numbing and pain that I normally get on rides over 35 miles. My feet seem "happy" at the moment...which is a huge improvement for me.

Linda