examples/barchart_demo.py problem

Yes, I am using matplotlib from cvs. I'll join the devel list to make
sure I know what changes are happening.

I did notice that the CHANGELOG file is not up to date, which is a shame
as it prevents someone from diagnosing their own problems. I thought
that one of the benefits of cvs is that you can check in changes with a
changelog comment so that you know where to rollback a change if there
are unforeseen problems.