I was running the roundup using wsgi in twisted web(latest 12.3.0). When I created new project with jinja2 template engine, I got this exceptions.

	Traceback (most recent call last):
	  File "/Volumes/Userland/Users/spikeekips/workspace/roundup/lib/python2.7/site-packages/Twisted-12.3.0-py2.7-macosx-10.8-x86_64.egg/twisted/application/app.py", line 402, in startReactor
	    self.config, oldstdout, oldstderr, self.profiler, reactor)
	  File "/Volumes/Userland/Users/spikeekips/workspace/roundup/lib/python2.7/site-packages/Twisted-12.3.0-py2.7-macosx-10.8-x86_64.egg/twisted/application/app.py", line 323, in 
runReactorWithLogging
	    reactor.run()
	  File "/Volumes/Userland/Users/spikeekips/workspace/roundup/lib/python2.7/site-packages/Twisted-12.3.0-py2.7-macosx-10.8-x86_64.egg/twisted/internet/base.py", line 1173, in run
	    self.mainLoop()
	  File "/Volumes/Userland/Users/spikeekips/workspace/roundup/lib/python2.7/site-packages/Twisted-12.3.0-py2.7-macosx-10.8-x86_64.egg/twisted/internet/base.py", line 1182, in mainLoop
	    self.runUntilCurrent()
	--- <exception caught here> ---
	  File "/Volumes/Userland/Users/spikeekips/workspace/roundup/lib/python2.7/site-packages/Twisted-12.3.0-py2.7-macosx-10.8-x86_64.egg/twisted/internet/base.py", line 778, in runUntilCurrent
	    f(*a, **kw)
	  File "/Volumes/Userland/Users/spikeekips/workspace/roundup/lib/python2.7/site-packages/Twisted-12.3.0-py2.7-macosx-10.8-x86_64.egg/twisted/web/wsgi.py", line 274, in wsgiWrite
	    self.request.write(bytes)
	  File "/Volumes/Userland/Users/spikeekips/workspace/roundup/lib/python2.7/site-packages/Twisted-12.3.0-py2.7-macosx-10.8-x86_64.egg/twisted/web/server.py", line 220, in write
	    http.Request.write(self, data)
	  File "/Volumes/Userland/Users/spikeekips/workspace/roundup/lib/python2.7/site-packages/Twisted-12.3.0-py2.7-macosx-10.8-x86_64.egg/twisted/web/http.py", line 980, in write
	    self.transport.writeSequence(toChunk(data))
	  File "/Volumes/Userland/Users/spikeekips/workspace/roundup/lib/python2.7/site-packages/Twisted-12.3.0-py2.7-macosx-10.8-x86_64.egg/twisted/internet/_newtls.py", line 204, in writeSequence
	    FileDescriptor.writeSequence(self, iovec)
	  File "/Volumes/Userland/Users/spikeekips/workspace/roundup/lib/python2.7/site-packages/Twisted-12.3.0-py2.7-macosx-10.8-x86_64.egg/twisted/internet/abstract.py", line 371, in writeSequence
	    raise TypeError("Data must not be unicode")
	exceptions.TypeError: Data must not be unicode

This exception was caused, `Jinja2ProxyPageTemplate` does return the valid `unicode` instead of `str`, so I patched roundup like this.

    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


Thanks.