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.

Thanks!  We were discussing this on the devel list - 
https://lists.sourceforge.net/lists/listinfo/roundup-devel.

I have patched your changes - 
http://roundup.hg.sourceforge.net/hgweb/roundup/roundup/rev/cf22ac054c08

Pradip, you should be able to close issues that others have created now.
Can you test it with this one (as it seems to be resolved from what I've 
seen.)

Thanks Bernhard!