diff -r f3bd51cdd958 Modules/posixmodule.c
--- a/Modules/posixmodule.c	Fri Sep 28 15:19:42 2012 -0400
+++ b/Modules/posixmodule.c	Fri Sep 28 21:43:54 2012 +0100
@@ -4042,7 +4042,8 @@
     Py_END_ALLOW_THREADS
 
     if (!result) {
-        return_value = win32_error_object(function_name, dst.object);
+        /* See comment below regarding path_error. */
+        return_value = win32_error_unicode(function_name, NULL);
         goto exit;
     }
 
@@ -4057,7 +4058,15 @@
     Py_END_ALLOW_THREADS
 
     if (result) {
-        return_value = path_error(function_name, &dst);
+        /*
+         * Which filename should we display as part of the error?
+         * It depends--for some errnos it should be src, for some
+         * it should be dst.  (Sadly we can't display both, yet.)
+         * The optimal fix would be to switch on errno and pick
+         * the appropriate path for that particular error.  Maybe
+         * in the future!
+         */
+        return_value = posix_error();
         goto exit;
     }
 #endif