mercurial/commands.py

--- a/mercurial/commands.py	Mon May 14 19:25:13 2012 -0400
+++ b/mercurial/commands.py	Sat May 12 19:38:20 2012 +0200
@@ -1011,7 +1011,8 @@
         heads = revs and map(repo.lookup, revs) or revs
         outgoing = discovery.findcommonoutgoing(repo, other,
                                                 onlyheads=heads,
-                                                force=opts.get('force'))
+                                                force=opts.get('force'),
+                                                portable=True)
         cg = repo.getlocalbundle('bundle', outgoing)
     if not cg:
         scmutil.nochangesfound(ui, outgoing and outgoing.excluded)