Two left feet?
In the drcsim-1.3.1 .dae files, it appears both feet have the same Y dimensions:
relative to 0 0 0 (the joint):
min -0.0825 -0.0616 -0.0811
max 0.1794 0.0627 0.0105
So each foot is about 1cm wider to the left, relative to the joint.
Let me know if I have interpreted this incorrectly.
Chris