mod_python and xml.dom.minidom problem

[Tom]

> 
> That seems to be the problem: You somehow have an old pyexpat
> module. Please make sure you recompile pyexpat from the sources that
> are included in PyXML 0.8 (or whatever version you are using).
> 

I reinstalled PyXML 0.8.1 and that upgraded the expat version to  1.95.5.

Now that my expat is correct, I now have the original error message that 
I was trying to fix :

------------------------------------------------------------------------
   File "/usr/lib/python2.2/site-packages/_xmlplus/dom/minidom.py", line 
1605, in parseString
     return expatbuilder.parseString(string)

   File "/usr/lib/python2.2/site-packages/_xmlplus/dom/expatbuilder.py", 
line 943, in parseString
     return builder.parseString(string)

   File "/usr/lib/python2.2/site-packages/_xmlplus/dom/expatbuilder.py", 
line 190, in parseString
     self._setup_subset(string)

   File "/usr/lib/python2.2/site-packages/_xmlplus/dom/expatbuilder.py", 
line 200, in _setup_subset
     if self.document.doctype:

AttributeError: 'NoneType' object has no attribute 'doctype'
-----------------------------------------------------------------------

I have just upgraded to Python 2.2.2 hoping that this might resolve 
something but with no luck.

This error _only_ happens when I call parseString from within 
apache-->mod_python, a parseString in the interpreter works correctly.

Thanks for all your help so far,
Tom