--- a/mercurial/localrepo.py	Mon Apr 04 16:21:57 2011 -0500
+++ b/mercurial/localrepo.py	Mon Apr 04 16:21:59 2011 -0500
@@ -522,7 +522,7 @@
         if isinstance(key, int):
             return self.changelog.node(key)
         elif key == '.':
-            return self.dirstate.parents()[0]
+            return self.dirstate.p1()
         elif key == 'null':
             return nullid
         elif key == 'tip':