New vc and Mercurial (hg)?

[skip at pobox.com]

It appears there is some support in the new vc for Mercurial (hg).  When I
visit a file I see a mercurial library is loaded.  Alas, ediff commands seem
not to work (e.g. ediff-revision claims the file I'm visiting isn't under
version control).  Are these problems known?

Thx,

-- 
Skip Montanaro - skip at pobox.com - http://www.webfast.com/~skip/