Is anyone else having problems when forking multiple processes?

I'm using postgres and am getting the following error:
File "ContactModel.py", line 42, in getContacts
for contactDBO in resultList:
File "SQLObject/DBConnection.py", line 134, in iterSelect
OperationalError: ERROR: SET TRANSACTION ISOLATION LEVEL must be called before any query

I'm using cherrypy with SQLObject and simply setting forking=1 in the config which creates a new process with every request.

Search the net - people have pointed fingers at connection pooling.

Has anyone experienced a similiar problem or know more about this?

Thanks much!
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J-P