--- Python-2.5.1/Modules/posixmodule.c.orig	2007-04-04 14:30:56.000000000 -0400

+++ Python-2.5.1/Modules/posixmodule.c	2008-06-14 17:35:47.000000000 -0400

@@ -2160,7 +2160,6 @@

 	struct dirent *ep;

 	int arg_is_unicode = 1;

-	errno = 0;

 	if (!PyArg_ParseTuple(args, "U:listdir", &v)) {

 		arg_is_unicode = 0;

 		PyErr_Clear();

@@ -2176,6 +2175,7 @@

 		return NULL;

 	}

 	for (;;) {

+		errno = 0;

 		Py_BEGIN_ALLOW_THREADS

 		ep = readdir(dirp);

 		Py_END_ALLOW_THREADS