leave it to me to be the odd ball here! I rode Speedplay Frogs and had to STOP riding them... due to too much float. My bike position was wonky as well which played into the problem...

I got fit by John Howard (lucky me that he lives nearby!!!!) and he drastically changed my bike position and told me that I IMMEDIATELY needed to stop riding Frogs... and to switch to a NO FLOAT pedal. Which I did... immediately. I have not had any pain since! Apparently my legs have to be completely locked in to keep 'em straight forward and pain free... I'm on Speedplay Zero's now and am a happy, happy and pain free rider...