It's turned out that this issue is caused by outdated *.pyc files. I have the same issue after upgrading from Hardy to Inprepid. But, after running python in root (sudo python -c 'import matplotlib'), which will regenerate *.pyc files after checking timestamp, the problem disappear.
It's turned out that this issue is caused by outdated *.pyc files. I have the same issue after upgrading from Hardy to Inprepid. But, after running python in root (sudo python -c 'import matplotlib'), which will regenerate *.pyc files after checking timestamp, the problem disappear.
- Michael