pod - KeyError while processing particular ods file

[David Burke]

See attached file.

Traceback:
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response
  115. response = callback(request, *callback_args, **callback_kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/decorators.py" in _wrapped_view
  25. return view_func(request, *args, **kwargs)
File "/home/david/Dropbox/Projects/django-sis/ecwsp/grades/views.py" in teacher_grade_download
  246. return replace_spreadsheet(template_path, filename, data, type)
File "/home/david/Dropbox/Projects/django-sis/ecwsp/sis/uno_report.py" in replace_spreadsheet
  116. return report.pod_save(infile, ext=".ods")
File "/home/david/Dropbox/Projects/django-sis/ecwsp/sis/template_report.py" in pod_save
  54. renderer.run()
File "/home/david/Dropbox/Projects/django-sis/appy/pod/renderer.py" in run
  387. self.currentParser.parse(self.contentXml)
File "/home/david/Dropbox/Projects/django-sis/appy/shared/xml_parser.py" in parse
  245. self.parser.parse(inputSource)
File "/usr/lib/python2.7/xml/sax/expatreader.py" in parse
  107. xmlreader.IncrementalParser.parse(self, source)
File "/usr/lib/python2.7/xml/sax/xmlreader.py" in parse
  123. self.feed(buffer)
File "/usr/lib/python2.7/xml/sax/expatreader.py" in feed
  207. self._parser.Parse(data, isFinal)
File "/usr/lib/python2.7/xml/sax/expatreader.py" in start_element
  301. self._cont_handler.startElement(name, AttributesImpl(attrs))
File "/home/david/Dropbox/Projects/django-sis/appy/pod/pod_parser.py" in startElement
  251. (attrs[e.tags['value-type']] == 'string') and \
File "/usr/lib/python2.7/xml/sax/xmlreader.py" in __getitem__
  316. return self._attrs[name]

Exception Type: KeyError at /grades/teacher_grade/download/395/
Exception Value: u'office:value-type'