[orca-list] firefox - page down doesn't work and error messages on the console



Hi,
I have ubuntu 7.10, firefox 3.0pre and orca 2.23.2pre, and I face the 
following problems for a long time:

1. when I press page down, it doesn't advance on the page. What could be the 
problem?

2. When I exit firefox, it appears the following messages on the console:

Script started on Fri 02 May 2008 03:01:41 AM WEST
]0;manuel laptop1: ~/firefoxmanuel laptop1:~/firefox$ ./firefox

(firefox-bin:17899): Gdk-CRITICAL **: gdk_screen_get_display: assertion 
`GDK_IS_SCREEN (screen)' failed

(firefox-bin:17899): GLib-GObject-WARNING **: invalid (NULL) pointer 
instance

(firefox-bin:17899): GLib-GObject-CRITICAL **: 
g_signal_handlers_disconnect_matched: assertion `G_TYPE_CHECK_INSTANCE 
(instance)' failed

(firefox-bin:17899): GLib-GObject-CRITICAL **: g_object_ref: assertion 
`G_IS_OBJECT (object)' failed

(firefox-bin:17899): Gdk-CRITICAL **: gdk_screen_get_display: assertion 
`GDK_IS_SCREEN (screen)' failed

(firefox-bin:17899): GLib-GObject-CRITICAL **: g_object_get_data: assertion 
`G_IS_OBJECT (object)' failed

(firefox-bin:17899): Gdk-CRITICAL **: gdk_screen_get_display: assertion 
`GDK_IS_SCREEN (screen)' failed

(firefox-bin:17899): GLib-GObject-CRITICAL **: g_object_get_data: assertion 
`G_IS_OBJECT (object)' failed

(firefox-bin:17899): Gdk-CRITICAL **: gdk_screen_get_display: assertion 
`GDK_IS_SCREEN (screen)' failed

(firefox-bin:17899): GLib-GObject-CRITICAL **: g_object_get_data: assertion 
`G_IS_OBJECT (object)' failed

(firefox-bin:17899): GLib-GObject-WARNING **: 
/build/buildd/glib2.0-2.14.1/gobject/gsignal.c:2180: invalid unclassed 
object pointer for value type `GdkScreen'

(firefox-bin:17899): Gdk-CRITICAL **: gdk_screen_get_display: assertion 
`GDK_IS_SCREEN (screen)' failed

(firefox-bin:17899): GLib-GObject-CRITICAL **: g_object_get_data: assertion 
`G_IS_OBJECT (object)' failed

(firefox-bin:17899): GLib-GObject-WARNING **: 
/build/buildd/glib2.0-2.14.1/gobject/gsignal.c:2180: invalid unclassed 
object pointer for value type `GdkScreen'

(firefox-bin:17899): GLib-GObject-CRITICAL **: g_object_unref: assertion 
`G_IS_OBJECT (object)' failed
]0;manuel laptop1: ~/firefoxmanuel laptop1:~/firefox$ exit

Script done on Fri 02 May 2008 03:02:08 AM WEST

Is it a bug of firefox? Are these messages known?

Thanks

Best regards

Sérgio Neves 




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