As does Eve (http://eve-language.blogspot.com/), as long as we're throwing out pet languages. ;-) Though I just redid virtually everything about Eve (changed it from a multiple-dispatch functional language to a single-dispatch prototype-based functional language) and haven't yet pushed the changes to GitHub.

For that matter, Ocaml/Haskell/Erlang all get it right, and those are not pet languages. And Cecil and Dylan almost get it right, but have some complications introduced by multimethods. So it's really just the popular languages tha screw up.