diff -r 9189ae05467d -r efe7ef325737 mercurial/util.py
--- a/mercurial/util.py	Sun Sep 30 16:38:42 2007 +0200
+++ b/mercurial/util.py	Tue Oct 02 20:25:35 2007 +0200
@@ -1095,7 +1095,7 @@
 
     def set_exec(f, mode):
         s = os.lstat(f).st_mode
-        if (s & 0100 != 0) == mode:
+        if stat.S_ISLNK(s) or (s & 0100 != 0) == mode:
             return
         if mode:
             # Turn on +x for every +r bit when making a file executable