I wonder if it's the outfit. Has your friend tried to change the outfit? I have two child outfits that literally create invisible torsos, and I can't figure out how to delete them.
Yeah, she's tried changing it four or five times, all with the same result, but because it seems to affect sims from toddler to elderhood, I'm thinking possibly it's something they wear from the start that screws things up, as if wearing it once causes the glitch permanently. Not sure though.
Did you ever install the maternity wear for teens?
She randomly downloaded loads of files from the booty over at PMBD, so there's a chance, but I doubt it's related to the maternity wear because it affects a few other sims, but this is the only one she took pics of.
Still, I'll tell her to steer clear of that outfit on future sims and check the downloads. Thanks for the replies!