Okay, I fixed it. Joint channels that link to parents need to have certain internal names, unlike joint channels that link to children. I fixed that problem after I had introduced it, but forgot to do it for the hip because I hadn't realized the hip was not the root.

If you feel adventurous, you can apply the fix yourself by editing the .cr2 and changing 'hiphandle_jointx' to 'jointx', 'hiphandle_jointz' to 'jointz' and 'hiphandle_twisty' to 'twisty' in the hip channels. To be save, better work on a copy of the orginal file.

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