diff -r d6f95bd1032d -r d4af295515c0 hooks/integrity.py
--- a/hooks/integrity.py	Mon Oct 19 17:49:50 2009 +0200
+++ b/hooks/integrity.py	Mon Oct 19 17:50:04 2009 +0200
@@ -64,6 +64,7 @@
     category = 'integrity'
 
 class UserIntegrityHook(IntegrityHook):
+    __abstract__ = True
     __select__ = IntegrityHook.__select__ & ~hook.regular_session()