This is that nagging message that gets spewed onto the terminal
about 20 times every time the editor loads a new widget:

=====================================================================
(glade-3:23444): Gtk-WARNING **: A floating object was finalized. This
means that someone
called g_object_unref() on an object that had only a floating
reference; the initial floating reference is not owned by anyone
and must be removed with gtk_object_sink() after a normal
reference is obtained with g_object_ref().
=====================================================================

It is fixed in my tree simply by adding:
    g_object_ref(G_OBJECT(tooltips));
    gtk_object_sink(GTK_OBJECT(tooltips));
    
to the code in glade_util_widget_set_tooltip();