Okay, there's not only the problem with the missing y-translations in the one on the right, but also the y-rotation doesn't seem to be fully applied to the hip. Except for the jumping knee, I'd say the one on the left looks just fine.

So I guess what Cage suggested could be a workable solution: keep Antonia 1.0.0 (or a cut-down version of it) around for use with Walk Designer and post-process the animations it produces.

-- I'm not mad at you, just Westphalian.