--- a/mercurial/subrepo.py	Mon Nov 14 18:16:01 2011 +0100
+++ b/mercurial/subrepo.py	Thu Nov 17 16:53:17 2011 -0600
@@ -223,7 +223,7 @@
         source.path = posixpath.normpath(source.path)
         parent = _abssource(repo._subparent, push, abort=False)
         if parent:
-            parent = util.url(parent)
+            parent = util.url(util.pconvert(parent))
             parent.path = posixpath.join(parent.path or '', source.path)
             parent.path = posixpath.normpath(parent.path)
             return str(parent)