diff -r 3aa0af7d539d -r 027264e720aa mercurial/util.py
--- a/mercurial/util.py	Fri Dec 28 17:10:57 2007 +0100
+++ b/mercurial/util.py	Sat Dec 29 01:14:45 2007 +0100
@@ -843,7 +843,7 @@
             m = os.stat(fn).st_mode & 0777
             new_file_has_exec = m & EXECFLAGS
             os.chmod(fn, m ^ EXECFLAGS)
-            exec_flags_cannot_flip = (os.stat(fn).st_mode == m)
+            exec_flags_cannot_flip = ((os.stat(fn).st_mode & 0777) == m)
         finally:
             os.unlink(fn)
     except (IOError, OSError):