0.83 iPython problem

I just updated to 0.83 and I am now having a problem with

    > Ipython. Running the following code as a script produces
    > the error message below. I am running Python 2.3.5 on
    > Windows XP with Ipython 0.6.15. I get the same message
    > regardless of whether or not I set ion().

    > How do I fix this?

Update from matplotlib CVS -- this bug was reported on Friday in the
thread "ipython and matplotlib-0.83" and will be included in a bug-fix
release next week.