diff -r ab545a15d807 -r 4e7e63fc685a mercurial/windows.py
--- a/mercurial/windows.py	Sat Jul 23 14:33:35 2011 -0500
+++ b/mercurial/windows.py	Sat Jul 23 12:29:52 2011 +0200
@@ -281,6 +281,9 @@
     # Don't support groups on Windows for now
     raise KeyError()
 
+def isexec(f):
+    return False
+
 from win32 import *
 
 expandglobs = True