PyXML pickle problem with PyXML0.8.1

[Jacob Smullyan]

I recklessly upgraded to PyXML 0.8.1 and found that
xml.dom.minidom.Document instances are now no longer pickleable,
because they define __slots__ without defining __getstate__.  Other
classes in minidom do support pickling, but not Document.  Is there a
reason for this? 

I think this is just a bug, best recorded on PyXML's bug tracker, but
in case someone wants to argue that it isn't, I thought I'd give them
an opportunity.  

Cheers,

Jacob Smullyan