Comment 10 for bug 1582496

It's coming to a year since I reported this issue. Below are the messages plaguing my syslog when Nautilus is started and when I press the items on the left are pressed. The look to be the same issues. I am using:
kernel 4.4.0-64-generic
nautilus 1:3.18.4.is.3.14.3-0ubuntu5.
libglib-perl 3:1.320-2
libglib2.0-0:amd64 2.48.2-0ubuntu1
Can an importance be defined and someone fix them?

Mar 12 22:14:46 Eliot gnome-session[2264]: message repeated 5 times: [ (nautilus:2558): Gtk-CRITICAL **: gtk_container_foreach: assertion 'GTK_IS_CONTAINER (container)' failed]
Mar 12 22:15:05 Eliot gnome-session[2264]: (nautilus:26639): GLib-GIO-CRITICAL **: g_dbus_interface_skeleton_unexport: assertion 'interface_->priv->connections != NULL' failed
Mar 12 22:15:05 Eliot gnome-session[2264]: (nautilus:26639): GLib-GIO-CRITICAL **: g_dbus_interface_skeleton_unexport: assertion 'interface_->priv->connections != NULL' failed
Mar 12 22:15:05 Eliot gnome-session[2264]: (nautilus:26639): Gtk-CRITICAL **: gtk_icon_theme_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
Mar 12 22:15:05 Eliot gnome-session[2264]: (nautilus:26639): GLib-GObject-WARNING **: invalid (NULL) pointer instance
Mar 12 22:15:05 Eliot gnome-session[2264]: (nautilus:26639): GLib-GObject-CRITICAL **: g_signal_connect_object: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
Mar 12 22:15:05 Eliot dbus[1432]: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service'
Mar 12 22:15:05 Eliot gnome-session[2264]: ** (nautilus:2558): CRITICAL **: nautilus_menu_provider_get_background_items: assertion 'NAUTILUS_IS_MENU_PROVIDER (provider)' failed
Mar 12 22:15:05 Eliot systemd[1]: Starting Hostname Service...
Mar 12 22:15:05 Eliot dbus[1432]: [system] Successfully activated service 'org.freedesktop.hostname1'
Mar 12 22:15:05 Eliot systemd[1]: Started Hostname Service.
Mar 12 22:15:13 Eliot gnome-session[2264]: ** (nautilus:2558): CRITICAL **: nautilus_menu_provider_get_background_items: assertion 'NAUTILUS_IS_MENU_PROVIDER (provider)' failed
Mar 12 22:15:15 Eliot gnome-session[2264]: message repeated 2 times: [ ** (nautilus:2558): CRITICAL **: nautilus_menu_provider_get_background_items: assertion 'NAUTILUS_IS_MENU_PROVIDER (provider)' failed]
Mar 12 22:15:16 Eliot gnome-session[2264]: ** (nautilus:2558): CRITICAL **: nautilus_menu_provider_get_background_items: assertion 'NAUTILUS_IS_MENU_PROVIDER (provider)' failed