Quote - All I changed for the pose was the keyframing for the trans and rot dials for the right thigh, right shin, and right foot.  Possibly the translation keyframing could create some issues, but it looked like there were already keys for each frame for the trans dials of all actors in the pose.

The only actors that should (possibly) have none zero translations are the hip, feet, and hands. I have checked, all the translations are the same in flip3, and AP4 walk.

Now this is interesting. For the right foot the translations also seem the match between files. But in both files, all the translations are zero until frame k 15.

This does not happen in the left foot, in the left foot all translations have none zero values. This does not tell us anything specific about flip3, but it probably explains why I am seeing the right toe going under the ground, but not the left. If I am right, it's an important discovery.