minor bug when using matplotlib

[RollsW]

Not a major bug, but if I:

1. run code to produce a matplotlib figure
2. open the pythonw window to adjust borders and spacing
3. open the pythonw window to export the values
4. re-run the code without closing the pythonw windows

The figure window and the pythonw windows lock up and I can't close them or do any editing. If I try and re-load the ipython console, I get a windows notification saying that python has stopped working. but it does seem to reload (eventually).

If I only close the export values window, I get a similar problem, where the figure window locks up (though the ipython restart seems less problematic)

Just wondering if it's worth adding something to automatically close these windows if the user forgets?

Thanks

Will