Gnome terminal, can't display Help

[Chris G]

In Fedora 7 when I click on 'Help' in the gnome-terminal menu I now
get a message saying:-

    There was an error displaying help: There was an error launching
    the default action command associated with this location.
    
It used to work so what have I screwed up? 

FWIW I wanted Help because the URL launching action isn't working
either, I suspect this could well be the same or similar issue.

It's a pity there isn't an ordinary man page for gnome-terminal, less
likely to get lost.

-- 
Chris Green