Critical warning messages

[David Bowskill]

Hello All
Could some kind soul(s) please tell what the following (below) mean and
what I can do about them.
These came up when I asked for help in the Archive Manager.

Thanks
David Bowskill

***********************************************************

(file-roller:3227): atk-bridge-WARNING **: AT_SPI_REGISTRY was not
started at session startup.

(file-roller:3227): atk-bridge-WARNING **: IOR not set.

(file-roller:3227): atk-bridge-WARNING **: Could not locate registry

(gnome-help:3240): atk-bridge-WARNING **: AT_SPI_REGISTRY was not
started at session startup.

(gnome-help:3240): atk-bridge-WARNING **: IOR not set.

(gnome-help:3240): atk-bridge-WARNING **: Could not locate registry

(gnome-help:3240): Gtk-CRITICAL **: gtk_tool_button_new: assertion
`icon_widget == NULL || GTK_IS_MISC (icon_widget)' failed

(gnome-help:3240): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(gnome-help:3240): GLib-GObject-CRITICAL **: g_signal_connect_data:
assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(gnome-help:3240): Gtk-CRITICAL **: gtk_toolbar_insert: assertion
`GTK_IS_TOOL_ITEM (item)' failed

(gnome-help:3240): Gtk-CRITICAL **: gtk_tool_button_new: assertion
`icon_widget == NULL || GTK_IS_MISC (icon_widget)' failed

(gnome-help:3240): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(gnome-help:3240): GLib-GObject-CRITICAL **: g_signal_connect_data:
assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(gnome-help:3240): Gtk-CRITICAL **: gtk_toolbar_insert: assertion
`GTK_IS_TOOL_ITEM (item)' failed
david at DJB-P4:~$