I've got the latest version of matplotlib (0.90) installed on my mac with the latest scipy and numpy. I'm trying to use matplotlib's 3D plotting functionality interactively from ipython on OS X (Intel Mac) with the TkAgg backend. Regular 2D plotting works just fine, but when I create an Axes3D instance using a pylab.figure instance (following the Scipy cookbook mplot3D page), as soon as I click in the Tk window a raft of error messages pops up in the ipython console. There seem to be several of the following errors occurring wherever matrix multiplication is involved:
File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/proj3d.py", line 185, in proj_transform_vec
vecw = nx.matrixmultiply(M,vec)
TypeError: unsupported operand type(s) for *: 'NoneType' and 'float'
Exception in Tkinter callback
The stack traces for these errors are very long, so I haven't included them. Am I missing some simple configuration detail to get 3D plotting working?