Damn, seems Qt GUI objects (windgets) aren't thread-safe: http://doc.trolltech.com/3.3/threads.html#11
So I'm going to have to find a way of using a thread to fetch the data, and then using the main program to update the GUI... Someone suggested using events: http://mail.python.org/pipermail/python-list/2002-February/089360.html -- http://mail.python.org/mailman/listinfo/python-list