Hi, I use Ubuntu Breezy Badger ( 5.10 ), Gnome 2.12. I installed gnome-python2-extra-devs version 2.12 by synaptic. I run python. $ python >>> import wnck Traceback (most recent call last): File "<stdin>", line 1, in ? ImportError: /usr/lib/python2.4/site-packages/gtk-2.0/wnck.so: undefined symbol: wnck_window_demands_attention Any idea? Thank you. Regards, Akbar