got this similar one previouly on the same session:
(gnome-terminal:17400): GLib-GObject-WARNING **: invalid uninstantiatable type `(null)' in cast to `GObject'
(gnome-terminal:17400): GLib-GObject-CRITICAL **: g_object_get_data: assertion `G_IS_OBJECT (object)' failed
so this bug seems to be related to a dependency rather than compiz or gnome-terminal
got this similar one previouly on the same session:
(gnome- terminal: 17400): GLib-GObject- WARNING **: invalid uninstantiatable type `(null)' in cast to `GObject'
(gnome- terminal: 17400): GLib-GObject- CRITICAL **: g_object_get_data: assertion `G_IS_OBJECT (object)' failed
so this bug seems to be related to a dependency rather than compiz or gnome-terminal