slight problem with new install on fedora linux and kde

I am having a slight problem with my install on FC3 Linux

    > running KDE. When I am developing scripts, I like to
    > generate a lot of plots along the way and want them to
    > refresh every time I run the script. When I run the
    > following code with the TkAgg backend it works o.k., but
    > with the GTKAgg backend, only the second plot updates:

See examples/dynamic_image_gtkagg.py for an example of how to use gtk
to make dynamic plots. You can also do this by manipulating the
interactive setting as discussed on
http://matplotlib.sourceforge.net/interactive.html

You may also want to read this FAQ -
http://matplotlib.sourceforge.net/faq.html#SHOW

Hope this helps...
JDH