RH 6.0, gnome packages from that.
This is probably because I upgraded from 5.2 to 6.0 instead of reinstalling. I didn't have a 'gnome users guide' in 5.2. When it upgraded, I think it decided that if I didn't have it before, then it didn't need installing now or something. Anyway -- tried gnome help browser off the panel. Got told, 'Error loading document: ghelp:users-guide' so went looking for the thing wondering what error there was in loading it. Error was, it turned out, that the thing didn't exist. I don't think this is a good error message for an interface that's trying to be userfriendly. "Document doesn't exist" might be more accurate, with a full path name, not just the filename.
Fix: for me, installing the guide :) For future, perhaps making it a more useful error message?
I've added a note "You may not have this documentation installed on
your system." or something like this.