Part of SF patch 101481: on Windows, os.path.join("a:", "b") should yield

"a:b", not "a:/b".  Similar change was made to posixmodule.c earlier.

Lib/ntpath.py

@@ -41,7 +41,7 @@ def join(a, *p):
     for b in p:
         if isabs(b):
             path = b
-        elif path == '' or path[-1:] in '/\\':
+        elif path == '' or path[-1:] in '/\\:':
             path = path + b
         else:
             path = path + os.sep + b