matplotlib runs perfectly on Windows, but is not compatible with Mac OS X, cannot be scaled operation, does not refresh gui，have encountered this problem?
Environment is: wxPython3.0 + matplotlib1.4 + Mac OS X10.8
demo: …/matplotlib-1.4.0/examples/user_interfaces/embedding_in_wx5.py
https://github.com/matplotlib/matplotlib/blob/master/examples/user_interfaces/embedding_in_wx5.py