--- a/web/views/cwproperties.py	Tue Oct 12 12:12:05 2010 +0200
+++ b/web/views/cwproperties.py	Tue Oct 12 14:10:58 2010 +0200
@@ -219,7 +219,9 @@
             self.form_row(form, key, splitlabel)
         renderer = self._cw.vreg['formrenderers'].select('cwproperties', self._cw,
                                                      display_progress_div=False)
-        return form.render(renderer=renderer)
+        data = []
+        form.render(w=data.append, renderer=renderer)
+        return u'\n'.join(data)
 
     def form_row(self, form, key, splitlabel):
         entity = self.entity_for_key(key)