OK, I went through every mod relating to females, and I think it's http://www.nexusmods.com/skyrim/mods/25259/? Remodeled Armor for CBBE Bodyslide and TBBP HDT. (This changes the prisoner outfit you start with which is why it happens at character creation) Whoops. Strange thing is, I've followed that mod's installation criteria and I have everything I need (CBBE, HDT, xp32 skeleton, realistic ragdolls and force, SKSE.) Hopefully it'll be as simple as deactivating everything again, then installing everything for just this mod, test it, install everything else. Hopefully. EDIT: Yeah, it works. Phew.