--- a/mercurial/localrepo.py	Wed Jan 18 17:18:38 2012 +0100
+++ b/mercurial/localrepo.py	Thu Jan 19 02:14:06 2012 +0100
@@ -326,6 +326,8 @@
 
         fp.close()
 
+        self.invalidatecaches()
+
         if '.hgtags' not in self.dirstate:
             self[None].add(['.hgtags'])