diff -r 632f4be4d1f3 -r cc24e4ed3e0c mercurial/localrepo.py
--- a/mercurial/localrepo.py	Wed Nov 30 16:20:07 2011 -0600
+++ b/mercurial/localrepo.py	Wed Nov 30 16:53:44 2011 -0600
@@ -918,7 +918,7 @@
         The callback will be executed on lock release."""
         l = self._lockref and self._lockref()
         if l:
-            l.postreleasehooks.append(callback)
+            l.postrelease.append(callback)
 
     def lock(self, wait=True):
         '''Lock the repository store (.hg/store) and return a weak reference