When I run "thunderbird" from the command-line, I get this: 


rrohde@rrohde-G75VW:~$ thunderbird 

(thunderbird:3114): Gtk-CRITICAL **: _ubuntu_gtk_overlay_scrollbar_new: assertion `os_scrollbar_new' failed

(thunderbird:3114): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_WIDGET (widget)' failed

(thunderbird:3114): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_IS_WIDGET (widget)' failed

(thunderbird:3114): GLib-GObject-CRITICAL **: g_object_set_data: assertion `G_IS_OBJECT (object)' failed

(thunderbird:3114): Gtk-CRITICAL **: _ubuntu_gtk_overlay_scrollbar_new: assertion `os_scrollbar_new' failed

(thunderbird:3114): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_WIDGET (widget)' failed

(thunderbird:3114): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_IS_WIDGET (widget)' failed

(thunderbird:3114): GLib-GObject-CRITICAL **: g_object_set_data: assertion `G_IS_OBJECT (object)' failed

(thunderbird:3114): Gtk-CRITICAL **: _ubuntu_gtk_overlay_scrollbar_new: assertion `os_scrollbar_new' failed

(thunderbird:3114): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_WIDGET (widget)' failed

(thunderbird:3114): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_IS_WIDGET (widget)' failed

(thunderbird:3114): GLib-GObject-CRITICAL **: g_object_set_data: assertion `G_IS_OBJECT (object)' failed

(thunderbird:3114): Gtk-CRITICAL **: _ubuntu_gtk_overlay_scrollbar_new: assertion `os_scrollbar_new' failed

(thunderbird:3114): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_WIDGET (widget)' failed

(thunderbird:3114): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_IS_WIDGET (widget)' failed

(thunderbird:3114): GLib-GObject-CRITICAL **: g_object_set_data: assertion `G_IS_OBJECT (object)' failed

(thunderbird:3114): Gtk-CRITICAL **: IA__gtk_widget_style_get: assertion `GTK_IS_WIDGET (widget)' failed
rrohde@rrohde-G75VW:~$ 
(crashreporter:3133): Gtk-CRITICAL **: _ubuntu_gtk_overlay_scrollbar_new: assertion `os_scrollbar_new' failed

(crashreporter:3133): Gtk-CRITICAL **: IA__gtk_widget_set_composite_name: assertion `GTK_IS_WIDGET (widget)' failed

(crashreporter:3133): Gtk-CRITICAL **: IA__gtk_widget_set_parent: assertion `GTK_IS_WIDGET (widget)' failed

(crashreporter:3133): GLib-GObject-CRITICAL **: g_object_ref: assertion `G_IS_OBJECT (object)' failed

(crashreporter:3133): Gtk-CRITICAL **: IA__gtk_widget_show: assertion `GTK_IS_WIDGET (widget)' failed

(crashreporter:3133): Gtk-CRITICAL **: IA__gtk_range_get_adjustment: assertion `GTK_IS_RANGE (range)' failed

(crashreporter:3133): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(crashreporter:3133): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(crashreporter:3133): Gtk-CRITICAL **: gtk_scrolled_window_adjustment_changed: assertion `adjustment != NULL' failed

(crashreporter:3133): Gtk-CRITICAL **: _ubuntu_gtk_overlay_scrollbar_new: assertion `os_scrollbar_new' failed

(crashreporter:3133): Gtk-CRITICAL **: IA__gtk_widget_set_composite_name: assertion `GTK_IS_WIDGET (widget)' failed

(crashreporter:3133): Gtk-CRITICAL **: IA__gtk_widget_set_parent: assertion `GTK_IS_WIDGET (widget)' failed

(crashreporter:3133): GLib-GObject-CRITICAL **: g_object_ref: assertion `G_IS_OBJECT (object)' failed

(crashreporter:3133): Gtk-CRITICAL **: IA__gtk_widget_show: assertion `GTK_IS_WIDGET (widget)' failed

(crashreporter:3133): Gtk-CRITICAL **: IA__gtk_range_get_adjustment: assertion `GTK_IS_RANGE (range)' failed

(crashreporter:3133): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(crashreporter:3133): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(crashreporter:3133): Gtk-CRITICAL **: gtk_scrolled_window_adjustment_changed: assertion `adjustment != NULL' failed

(crashreporter:3133): Gtk-CRITICAL **: IA__gtk_range_get_adjustment: assertion `GTK_IS_RANGE (range)' failed

(crashreporter:3133): Gtk-CRITICAL **: IA__gtk_range_get_adjustment: assertion `GTK_IS_RANGE (range)' failed

(crashreporter:3133): Gtk-CRITICAL **: IA__gtk_widget_size_request: assertion `GTK_IS_WIDGET (widget)' failed

(crashreporter:3133): Gtk-CRITICAL **: IA__gtk_widget_size_request: assertion `GTK_IS_WIDGET (widget)' failed

(crashreporter:3133): GLib-GObject-CRITICAL **: g_object_get_qdata: assertion `G_IS_OBJECT (object)' failed

(crashreporter:3133): GLib-GObject-CRITICAL **: g_object_get_qdata: assertion `G_IS_OBJECT (object)' failed