Ticket #587 (defect)

From http://www.python.org/dev/buildbot/community/2.5/amd64%20Ubuntu%20Dapper%202.5/builds/43/step-CherryPy/0

======================================================================
FAIL: test_02_wrapped_wsgi (test_wsgiapps.WSGIAppTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/buildslave/pybot/2.5.murphy-amd64/build/cherrypy/cherrypy/test/webtest.py", line 225, in __call__
    testMethod()
  File "/home/buildslave/pybot/2.5.murphy-amd64/build/cherrypy/cherrypy/test/test_wsgiapps.py", line 72, in test_02_wrapped_wsgi
    self.assertHeader("Content-Type", "text/plain")
  File "/home/buildslave/pybot/2.5.murphy-amd64/build/cherrypy/cherrypy/test/webtest.py", line 325, in assertHeader
    self._handlewebError(msg)
  File "/home/buildslave/pybot/2.5.murphy-amd64/build/cherrypy/cherrypy/test/webtest.py", line 170, in _handlewebError
    raise self.failureException(msg)
AssertionError: 'Content-Type':'text/plain' not in headers

This does *not* fail under Python 2.4 on my machine, but it does under 2.5.