Gtk Warnings: what's this?

["Fabio Zanetta" <znt fabio virgilio it>]

Hi all,

I got some warning by Gtk and I don't understand why...

Can you explain me the meanings?

--- 1 ---
(<unknown>:1176): Gtk-CRITICAL **: file gtkwidget.c: line 3756
(gtk_widget_set_parent): assertion `widget->parent == NULL' failed

Both widget and it's container aren't null and the gtk_widget_set_parent()
do its work... what's wrong?

--- 2 ---
(<unknown>:1176): Gtk-CRITICAL **: file gtkcontainer.c: line 2284
(gtk_container_propagate_expose): assertion `GTK_IS_WIDGET (child)' failed

This I reallay have no idea about its meaning.
What's gtk_container_propagate_expose()? I don't use this function.

--- 3 ---
(<unknown>:1176): Gtk-CRITICAL **: file gtkwidget.c: line 1579
(gtk_widget_destroy): assertion `GTK_IS_WIDGET (widget)' failed

In this case widget is a (I think valid) GtkEntry...

Can someone tell me the possible causes of this messages?

Thank you!