Some wiki pages (default ones) are broken (don't render correctly)

[jmt4b04d4v]

Following (default) wiki pages arise UnicodeEncodeError:

• WikiProcessors
• WikiRestructuredText
• WikiRestructuredTextLinks

  Traceback (most recent call last):
    File "/usr/local/trac-0.10.5dev//lib/python2.4/site-packages/trac/web/main.py", line 406, in dispatch_request
      dispatcher.dispatch(req)
    File "/usr/local/trac-0.10.5dev//lib/python2.4/site-packages/trac/web/main.py", line 237, in dispatch
      resp = chosen_handler.process_request(req)
    File "/usr/local/trac-0.10.5dev//lib/python2.4/site-packages/trac/wiki/web_ui.py", line 135, in process_request
      self._render_view(req, db, page)
    File "/usr/local/trac-0.10.5dev//lib/python2.4/site-packages/trac/wiki/web_ui.py", line 442, in _render_view
      req.hdf['wiki'] = {
    File "/usr/local/trac-0.10.5dev//lib/python2.4/site-packages/trac/wiki/formatter.py", line 1001, in wiki_to_html
      Formatter(env, req, absurls, db).format(wikitext, out, escape_newlines)
    File "/usr/local/trac-0.10.5dev//lib/python2.4/site-packages/trac/wiki/formatter.py", line 795, in format
      self.handle_code_block(line)
    File "/usr/local/trac-0.10.5dev//lib/python2.4/site-packages/trac/wiki/formatter.py", line 734, in handle_code_block
      self.out.write(to_unicode(self.code_processor.process(
    File "/usr/local/trac-0.10.5dev//lib/python2.4/site-packages/trac/wiki/formatter.py", line 114, in process
      text = self.processor(req, text)
    File "/usr/local/trac-0.10.5dev//lib/python2.4/site-packages/trac/wiki/formatter.py", line 106, in _mimeview_processor
      return Mimeview(self.env).render(req, self.name, text)
    File "/usr/local/trac-0.10.5dev//lib/python2.4/site-packages/trac/mimeview/api.py", line 466, in render
      self.log.warning('HTML preview using %s failed (%s)'
  UnicodeEncodeError: 'ascii' codec can't encode character u'\xf3' in position 13: ordinal not in range(128)