[Groff] character garble

[D. E. Evans]

I have installed 1.19.2 (via todays cvs checkout) onto an OpenBSD
3.7 system, (which uses 1.15 by default).  This also required an
upgrade of texinfo to 4.8, (both of which I installed from source).

I get the following result when accessing the man page for groff (though
texinfo's came out fine):

<URL:http://www.deevans.net/groff.png>

I'm sure there's something silly I've overlooked.  Perhaps someone could
point it out to me?