(gnome-settings-daemon:1413): GLib-CRITICAL **: g_variant_new_string: assertion `string != NULL' failed
(metacity:1427): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",
(polkit-gnome-authentication-agent-1:1465): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",
(canberra-gtk-play:1469): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",
(ubuntuone-launch:1643): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",
(applet.py:1646): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",