TracError: Genshi UnicodeEncodeError error while rendering template (fresh Trac install)

[dereks@…]

I have installed Trac like I have several times before, using 0.11 and 0.12, under Ubuntu 8.04 and Ubuntu 10.04. Today I installed 0.12.2 fresh, using this command:

sudo easy_install Trac

But when I visit my Trac site, I get this error in my web page:

Traceback (most recent call last):
  File "/usr/local/lib/python2.6/dist-packages/Trac-0.12.2-py2.6.egg/trac/web/api.py", line 440, in send_error
    data, 'text/html')
  File "/usr/local/lib/python2.6/dist-packages/Trac-0.12.2-py2.6.egg/trac/web/chrome.py", line 885, in render_template
    location=location))
TracError: Genshi UnicodeEncodeError error while rendering template '/usr/local/lib/python2.6/dist-packages/Trac-0.12.2-py2.6.egg/trac/templates/layout.html', line 12, char -1

I have several plugins installed, but the exception seems to be coming from the core Trac code, not one of the plugins. (Again, this all worked before.)

How do I troubleshoot this issue? There is no additional information in the Apache logs (I'm using mod_python).

A possibly related problem: When I visit my "/projects" URL, I get an internal server error and this Unicode error is in my Apache error.log:

[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10] mod_python (pid=4934, interpreter='main_interpreter', phase='PythonHandler', handler='trac.web.modpython_frontend'): Application error
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10] ServerName: 'derek.example.com'
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10] DocumentRoot: '/var/www'
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10] URI: '/projects/'
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10] Location: '/projects'
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10] Directory: None
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10] Filename: '/var/www/projects'
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10] PathInfo: '/'
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10] Traceback (most recent call last):
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10]   File "/usr/lib/python2.6/dist-packages/mod_python/importer.py", line 1537, in HandlerDispatch\n    default=default_handler, arg=req, silent=hlist.silent)
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10]   File "/usr/lib/python2.6/dist-packages/mod_python/importer.py", line 1229, in _process_target\n    result = _execute_target(config, req, object, arg)
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10]   File "/usr/lib/python2.6/dist-packages/mod_python/importer.py", line 1128, in _execute_target\n    result = object(arg)
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10]   File "/usr/local/lib/python2.6/dist-packages/Trac-0.12.2-py2.6.egg/trac/web/modpython_frontend.py", line 149, in handler\n    gateway.run(dispatch_request)
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10]   File "/usr/local/lib/python2.6/dist-packages/Trac-0.12.2-py2.6.egg/trac/web/wsgi.py", line 89, in run\n    response = application(self.environ, self._start_response)
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10]   File "/usr/local/lib/python2.6/dist-packages/Trac-0.12.2-py2.6.egg/trac/web/main.py", line 411, in dispatch_request\n    env_paths)
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10]   File "/usr/local/lib/python2.6/dist-packages/Trac-0.12.2-py2.6.egg/trac/web/main.py", line 703, in send_project_index\n    req.send(output, 'text/html')
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10]   File "/usr/local/lib/python2.6/dist-packages/Trac-0.12.2-py2.6.egg/trac/web/api.py", line 416, in send\n    self.write(content)
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10]   File "/usr/local/lib/python2.6/dist-packages/Trac-0.12.2-py2.6.egg/trac/web/api.py", line 534, in write\n    raise ValueError("Can't send unicode content")
[Sun Apr 10 23:58:58 2011] [error] [client 192.168.2.10] ValueError: Can't send unicode content

[Remy Blank]

Does the name of one of your projects have any non-ASCII characters? Or possibly the content of the [project] name entry in trac.ini?

Can you please try again with all plugins disabled, just to make sure there's no influence?