ZEditingContextSessioning failing to init

Greetings,

In the process of starting my zope server, getting this error:

------
2006-03-03T10:29:05 ERROR(200) Products.ZEditingContextSessioning The  
session data container's destruction callback already set --  
installation aborted
------

My config is:
OSX Tiger
python 2.3.5
Zope 2.7.6
Modeling-0.9
ZModeling-0.9

I have a zeoclient(1)/zeoserver setup and I used <http:// 
longsleep.org/howto/sharesessionwithzeo> for configuration of the  
session storage. Also getting the same error with previous version.

Any ideas?

Paul


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