Also, I don't know if it's related, but I'm getting this Error / Warning:
UnboundLocalError: local variable 'pylab' referenced before assignment
Traceback:
  File "c:\Python25\lib\site-packages\matplotlib\toolkits\basemap\basemap.py", line 2232, in imshow
    ax = pylab.gca()
 
As my script calls the various basemap.py methods(imshow, drawcoastlines, drawcountries, etc.)