diff -x '.*.swp' -x '*.txt' -uNr a/roundup/cgi/engine_jinja2.py b/roundup/cgi/engine_jinja2.py
--- a/roundup/cgi/engine_jinja2.py        2013-03-05 23:56:45.000000000 +0900
+++ b/roundup/cgi/engine_jinja2.py        2013-03-15 17:35:57.000000000 +0900
@@ -75,7 +75,7 @@
         # [ ] limit the information passed to the minimal necessary set
         c = context(client, self, classname, request)
         c.update({'options': options})
-        return self._tpl.render(c)
+        return self._tpl.render(c).encode(client.charset, )

     def __getitem__(self, name):
         # [ ] figure out what are these for