diff -r 31906bc290ff -r 0918e3b54f0b states.py
--- a/states.py	Thu Jul 07 11:10:05 2011 +0200
+++ b/states.py	Thu Jul 07 13:44:15 2011 +0200
@@ -331,6 +331,7 @@
 
         def _readenabledstates(self):
             states = set()
+            states.add(ST0)
             mapping = dict([(st.name, st) for st in STATES])
             try:
                 f = self.opener('states/Enabled')