--- a/hgext/obsolete.py	Mon Jul 30 14:45:42 2012 +0200
+++ b/hgext/obsolete.py	Tue Jul 31 12:45:24 2012 +0200
@@ -75,6 +75,8 @@
 from mercurial import localrepo
 from mercurial import cmdutil
 from mercurial import templatekw
+from mercurial import obsolete
+setattr(obsolete, '_enabled', True)
 
 try:
     from mercurial.localrepo import storecache