Index: Lib/macpath.py
===================================================================
--- Lib/macpath.py	(revision 43476)
+++ Lib/macpath.py	(working copy)
@@ -74,7 +74,7 @@
     It is always true that root + ext == p."""
 
     i = p.rfind('.')
-    if i<=p.rfind(':'):
+    if i<=p.rfind(':')+1:
         return p, ''
     else:
         return p[:i], p[i:]
Index: Lib/ntpath.py
===================================================================
--- Lib/ntpath.py	(revision 43476)
+++ Lib/ntpath.py	(working copy)
@@ -187,7 +187,7 @@
     Return (root, ext), either part may be empty."""
 
     i = p.rfind('.')
-    if i<=max(p.rfind('/'), p.rfind('\\')):
+    if i<=max(p.rfind('/'), p.rfind('\\'))+1:
         return p, ''
     else:
         return p[:i], p[i:]
Index: Lib/posixpath.py
===================================================================
--- Lib/posixpath.py	(revision 43476)
+++ Lib/posixpath.py	(working copy)
@@ -90,7 +90,7 @@
     """Split the extension from a pathname.  Extension is everything from the
     last dot to the end.  Returns "(root, ext)", either part may be empty."""
     i = p.rfind('.')
-    if i<=p.rfind('/'):
+    if i<=p.rfind('/')+1:
         return p, ''
     else:
         return p[:i], p[i:]
Index: Lib/test/test_macpath.py
===================================================================
--- Lib/test/test_macpath.py	(revision 43476)
+++ Lib/test/test_macpath.py	(working copy)
@@ -48,7 +48,7 @@
         splitext = macpath.splitext
         self.assertEquals(splitext(":foo.ext"), (':foo', '.ext'))
         self.assertEquals(splitext("foo:foo.ext"), ('foo:foo', '.ext'))
-        self.assertEquals(splitext(".ext"), ('', '.ext'))
+        self.assertEquals(splitext(".ext"), ('.ext', ''))
         self.assertEquals(splitext("foo.ext:foo"), ('foo.ext:foo', ''))
         self.assertEquals(splitext(":foo.ext:"), (':foo.ext:', ''))
         self.assertEquals(splitext(""), ('', ''))
Index: Lib/test/test_ntpath.py
===================================================================
--- Lib/test/test_ntpath.py	(revision 43476)
+++ Lib/test/test_ntpath.py	(working copy)
@@ -18,7 +18,7 @@
 
 tester('ntpath.splitext("foo.ext")', ('foo', '.ext'))
 tester('ntpath.splitext("/foo/foo.ext")', ('/foo/foo', '.ext'))
-tester('ntpath.splitext(".ext")', ('', '.ext'))
+tester('ntpath.splitext(".ext")', ('.ext', ''))
 tester('ntpath.splitext("\\foo.ext\\foo")', ('\\foo.ext\\foo', ''))
 tester('ntpath.splitext("foo.ext\\")', ('foo.ext\\', ''))
 tester('ntpath.splitext("")', ('', ''))
Index: Lib/test/test_posixpath.py
===================================================================
--- Lib/test/test_posixpath.py	(revision 43476)
+++ Lib/test/test_posixpath.py	(working copy)
@@ -46,7 +46,7 @@
     def test_splitext(self):
         self.assertEqual(posixpath.splitext("foo.ext"), ("foo", ".ext"))
         self.assertEqual(posixpath.splitext("/foo/foo.ext"), ("/foo/foo", ".ext"))
-        self.assertEqual(posixpath.splitext(".ext"), ("", ".ext"))
+        self.assertEqual(posixpath.splitext(".ext"), (".ext", ""))
         self.assertEqual(posixpath.splitext("/foo.ext/foo"), ("/foo.ext/foo", ""))
         self.assertEqual(posixpath.splitext("foo.ext/"), ("foo.ext/", ""))
         self.assertEqual(posixpath.splitext(""), ("", ""))