invalid ip addr on hg serve

[TK Soh]

I noticed hg serve in Mercurial 1.0 always shows the IP address as 0.0.0.0:

    % hg version
    Mercurial Distributed SCM (version 1.0)

    Copyright (C) 2005-2008 Matt Mackall <mpm at selenic.com> and others
    This is free software; see the source for copying conditions. There is NO
    warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

    % hg serve -v
    listening at http://XXX.YYYY.net:8000/ (0.0.0.0:8000)


What am I missing?