I am in the process of making a town for my 100 babies challenge and I was making up families. Everything was going well until...
Well, I made a random male and female sim and then used the genetics option to make them have a suitible child. Only the kid did not have a body, only a head and legs, and its torso and arms were adult sized, deformed and floating madly in the air.
I aged her up to an adult and she grew into them... however, she is now totally naked (aside from a pair of shoes). It's hilarious, but I am not sure what happened. I did the same thing for their secon child and she turned out compeltely normal.
chances are the bad CC is still installed (since you can delete the sims but the items it came in with will still be installed). Check your launcher and see if their are any long black boots. That might be the culprit.