diff -r 7a5524f240ad -r 594fc9329628 mercurial/dirstate.py
--- a/mercurial/dirstate.py	Wed Mar 14 14:45:41 2012 -0500
+++ b/mercurial/dirstate.py	Thu Mar 15 00:46:37 2012 +0900
@@ -78,10 +78,6 @@
         return self._copymap
 
     @propertycache
-    def _normroot(self):
-        return util.normcase(self._root)
-
-    @propertycache
     def _foldmap(self):
         f = {}
         for name in self._map:
@@ -406,7 +402,7 @@
                 folded = path
             else:
                 folded = self._foldmap.setdefault(normed,
-                                util.fspath(normed, self._normroot))
+                                util.fspath(normed, self._root))
         return folded
 
     def normalize(self, path, isknown=False):