[Groff] man stopped working - groff: can't find `DESC' file

[Blake McBride]

I am running Ubuntu Linux 7.10.  man has worked fine until I installed 
the latest (current) groff.  The new groff seems to work fine but man 
doesn't anymore.  Now when I try 'man ls' I get:

   groff: can't find `DESC' file
   groff:fatal error: invalid device `utf8'
    Manual page ls(1) line ?/? (END)

Any help would be appreciated.

Blake McBride