After installing GNOME on my Redhat 6.0 system I noticed
that a lot of the the menus in 'fvwm2' had an entry with the
same name as the title of the directory but which didn't do
anything when clicked on.

Investigation showed this in the (generated) fvwmrc file:

# The following is added by package: Games
AddToMenu       AUTO_WM_CONFIG.Games    "Games" Exec    &


Further investigation showed that this line was being added
by 'wmconfig'(v 0.9.5) when it parsed
"/usr/share/gnome/apps/Games/.directory".  That
file, I guess, contains info that GNOME uses when it
generates menu titles.

I think the easiest (and probably correct) fix is to change
(in "input-gnome.c" in 'read_gnome_file()'):

    if (!dentry->name && !dentry->exec[0]) {
        gnome_desktop_entry_free(dentry);
        return -1;
    }

to:

    if (!dentry->name || !dentry->exec[0]) {
        gnome_desktop_entry_free(dentry);
        return -1;
    }

That way if, in general, there is some config file out there
which gives no 'exec' line, it won't be added to the menu.

ps.  I noted that this has not been changed in 'wmconfig'
0.9.7, either.