[Zope] strange error on first load of zope page

[Toby Sargeant]

The first page I try and load after restarting the zserver invariably contains
the following error.

It always occurs *after* the page has successfully been rendered (I have added
debugging so that I can see the path traversal, and SQL statements executed).
Hitting reload will then display the page properly, and I won't see the error
again until i restart the server.

(The actual text from the html source is
'Cannot pickle <type 'module'> objects')

It seems perfectly reasonable to me that you can't pickle a module, but what
I'm having trouble understanding is why zope is trying to. Can anyone suggest
a way that I could try and track down why this is happening?

thanks,

toby.

===============================================================================
Zope has encountered an error while publishing this resource. 

Error Type: UnpickleableError
Error Value: Cannot pickle objects

...

Traceback (innermost last):
	File /export/home/toby/zope/Zope2/lib/python/ZPublisher/Publish.py, line 222, in publish_module
	File /export/home/toby/zope/Zope2/lib/python/ZPublisher/Publish.py, line 187, in publish
	File /export/home/toby/zope/Zope2/lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook
	(Object: proj)
	File /export/home/toby/zope/Zope2/lib/python/ZPublisher/Publish.py, line 175, in publish
	File /export/home/toby/zope/Zope2/lib/python/Zope/__init__.py, line 235, in commit
	File /export/home/toby/zope/Zope2/lib/python/ZODB/Transaction.py, line 251, in commit
	File /export/home/toby/zope/Zope2/lib/python/ZODB/Connection.py, line 349, in commit
	(Info: (('Products.ExternalMethod.ExternalMethod', 'ExternalMethod'), '\000\000\000\000\000\000\032 ', ''))
UnpickleableError: (see above)

-- 
  [ Toby Sargeant : Inpharmatica : Developer : t.sargeant@inpharmatica.co.uk ]
      [ http://www.inpharmatica.co.uk : 020 7631 4644 fax 020 7631 4844 ]