Index: src/plone/recipe/zope2instance/__init__.py
===================================================================
--- src/plone/recipe/zope2instance/__init__.py	(revisão 93528)
+++ src/plone/recipe/zope2instance/__init__.py	(cópia de trabalho)
@@ -276,7 +276,8 @@
                     # postgresql
                     template = ("dbname='%(dbname)s' user='%(user)s' "
                                 "host='%(host)s' password='%(password)s'")
-                    rel_storage = dict(dsn=template % rel_storage)
+                    rel_storage.update(dict(dsn=template % rel_storage))
+                    for value in ('dbname','user','host','password'): rel_storage.pop(value)
 
                 rel_storage_outer_opts = (
                     'poll-interval',