From BBC News:
The model, which uses footprints to predict gait, suggests “Lucy”, as the first fossil afarensis was called, walked rather like us. This contradicts earlier suggestions that Lucy shuffled like a bipedally walking chimpanzee. The research is published in the Royal Society Interface journal. “I think it is very interesting work,” Professor Chris Stringer, head of human origins at the Natural History Museum in London, told the BBC News website. “There was controversy as to whether [footprints purported to be from afarensis] were showing a human pattern. And it looks like they do.”
More here.