diff -r 0c508d87f80b Lib/ntpath.py
--- a/Lib/ntpath.py	Fri Dec 06 17:25:51 2013 +0200
+++ b/Lib/ntpath.py	Fri Dec 06 20:38:51 2013 +0200
@@ -204,7 +204,7 @@
     empty = _get_empty(p)
     if len(p) > 1:
         sep = _get_sep(p)
-        normp = normcase(p)
+        normp = p.replace(_get_altsep(p), sep)
         if (normp[0:2] == sep*2) and (normp[2:3] != sep):
             # is a UNC path:
             # vvvvvvvvvvvvvvvvvvvv drive letter or UNC path
diff -r 0c508d87f80b Lib/test/test_ntpath.py
--- a/Lib/test/test_ntpath.py	Fri Dec 06 17:25:51 2013 +0200
+++ b/Lib/test/test_ntpath.py	Fri Dec 06 20:38:51 2013 +0200
@@ -66,6 +66,8 @@
                ('', '\\\\conky\\\\mountpoint\\foo\\bar'))
         tester('ntpath.splitdrive("//conky//mountpoint/foo/bar")',
                ('', '//conky//mountpoint/foo/bar'))
+        self.assertEqual(ntpath.splitdrive('//conky/mountpoint\u0130/foo/bar'),
+                         ('//conky/mountpoint\u0130', '/foo/bar'))
 
     def test_split(self):
         tester('ntpath.split("c:\\foo\\bar")', ('c:\\foo', 'bar'))