Opening resource editor with python 2.5

Hi
I recently upgraded to Python 2.5 , on Mac OSX 10.5.5

ResourceEditor.py won't open for me now, using PythonCard 0.8.2  -  traceback is:

Traceback (most recent call last):
  File "/BinaryCache/wxWidgets/wxWidgets-11~262/Root/System/Library/Frameworks/Python.framework/Versions/2.5/Extras/lib/python/wx-2.8-mac-unicode/wx/_core.py", line 14095, in <lambda>
  File "resourceEditor.py", line 138, in on_initialize
    self.propertyEditorWindow = model.childWindow(self, PropertyEditor)
  File "/Library/Python/2.5/site-packages/PythonCard/model.py", line 213, in childWindow
    rsrc = resource.ResourceFile(filename).getResource()
  File "/Library/Python/2.5/site-packages/PythonCard/resource.py", line 45, in __init__
    self.dictionary = util.readAndEvalFile(rsrcFileName)
  File "/Library/Python/2.5/site-packages/PythonCard/util.py", line 39, in readAndEvalFile
    f = open(filename)
TypeError: coercing to Unicode: need string or buffer, NoneType found

Any ideas? Apologies if this isn't the right forum.

Tony

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