Mac OS X - ImportError: cannot import name POLAR

Hi,

I've installed matplotlib 0.71 on Mac OS X 10.3 which completed without errors.

when I run python
  "import matplotlib"
is fine, but
  "import pylab"
bombs with
  "ImportError: cannot import name POLAR"

see below for a screendump of the reported errors when I try to import pylab.
I did not run this in the build directory.

/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages
(which is linked to /Library/Python/2.3)

/Library/Python/2.3/matplotlib/transforms.py, line 189: from _transforms import IDENTITY, LOG10, POLAR, Func, FuncXY
/Library/Python/2.3/matplotlib/_transforms.so exists and is 3503536 bytes in size.

here is a screendump of the reported errors when I try to import pylab.
I did not run this in the build directory.

can anyone help?

regards,

Graeme

[graeme:~/Desktop/downloads/matplotlib-0.71] gjok% python
Python 2.3 (#1, Sep 13 2003, 00:49:11)
[GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import pylab
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/pylab.py", line 1, in ?
     from matplotlib.pylab import *
   File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/matplotlib/pylab.py", line 190, in ?
     from axes import Axes, PolarAxes
   File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/matplotlib/axes.py", line 12, in ?
     from artist import Artist
   File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/matplotlib/artist.py", line 3, in ?
     from transforms import identity_transform
   File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/matplotlib/transforms.py", line 189, in ?
     from _transforms import IDENTITY, LOG10, POLAR, Func, FuncXY
ImportError: cannot import name POLAR