Dorian and mebook suddenly cannot open any epub books.
 

Yesterday i installed dorian and mebook, they worked normally.
Today I cannot open any epub books.
I installed syslogd to find out what happened, I can see the following in syslog:

Nov 8 12:07:31 Nokia-N900 dorian[2594]: GLIB CRITICAL ** GLib-GObject - g_object_get: assertion `G_IS_OBJECT (object)' failed
Nov 8 12:07:31 Nokia-N900 dorian[2594]: GLIB CRITICAL ** Gtk - gtk_widget_set_sensitive: assertion `GTK_IS_WIDGET (widget)' failed

What can I do work arround this?