D'oh! I don't know why I don't have a menu. The icons on the background seem to have the stuff in them. I get the following problems reported by startx:
"xauth: (stdin):1: bad "add" command line" - this occurs twice, each time after it tries to create an authority file (which it does, in all, four times).
"Could not init font path element /usr/X11R6/lib/X11/fonts/100dpi/, removing from list!" - I'm missing a font then?
"cat: /home/root/.Xauthority: No such file or directory" - after all that effort to create one?
Various warning about function keys not existing. I'm surprised nobody altered it to stop it trying to bind things to function keys!
(mb-applet-volume:619): Gtk-WARNING **: Attempting to add a widget with type GtkVbox to a GtkWindow, but as a GtkBin subclass a GtkWindow can only contain one widget at a time; it already contains a widget of type GtkVScale" - could this be it?