[pygtk] gnome.ui.AppBar Bug?

[Mystilleef]

Hello,

I'm using gnome-python-2.10. Everytime I try to use any of the AppBar
methods, it fails with the following warning message.

GtkWarning: gtk_label_set_text: assertion `GTK_IS_LABEL (label)' failed

My code looks something like this:

statusbar = gnome.ui.AppBar(True, True)
statusbar.set_default("")
statusbar.push("Testing...testing...testing")
statusbar.pop()
statusbar.push("It does not work")
statusbar.clear_stack()

For each and every method, it fails the warning message presented
above. Is this a bug? What am I doing wrong?