diff -r 8108d566a8b5 -r 97a5c943db19 hgext/states.py
--- a/hgext/states.py	Mon Sep 19 01:11:10 2011 +0200
+++ b/hgext/states.py	Mon Sep 19 01:55:35 2011 +0200
@@ -636,7 +636,10 @@
     try:
         for h in heads:
             f.write(hex(h) + '\n')
-        f.rename()
+        try:
+            f.rename()
+        except AttributeError: # old version
+            f.close()
     finally:
         f.close()
 
@@ -852,7 +855,10 @@
             try:
                 for st in self._enabledstates:
                     f.write(st.name + '\n')
-                f.rename()
+                try:
+                    f.rename()
+                except AttributeError: # old version
+                    f.close()
             finally:
                 f.close()