Opening and image file from the terminal using gthumb causes the following error: $ gthumb passwords.png converting comment system...done. (gthumb:2798): Gtk-CRITICAL **: gtk_icon_info_get_filename: assertion `icon_info != NULL' failed (gthumb:2798): Gtk-CRITICAL **: gtk_icon_info_free: assertion `icon_info != NULL' failed (gthumb:2798): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed (gthumb:2798): Gtk-CRITICAL **: gtk_icon_info_get_filename: assertion `icon_info != NULL' failed (gthumb:2798): Gtk-CRITICAL **: gtk_icon_info_free: assertion `icon_info != NULL' failed (gthumb:2798): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed
What does this have to do with Xfce? Bug the gthumb developers.