Python Traceback
Most recent call last:

File "/usr/lib/python2.5/site-packages/Trac-0.11.1-py2.5.egg/trac/wiki/templates/wiki_edit.html", line 56, in <Expression u'wiki_to_html(context(page.resource), page.text)'>
  ${wiki_to_html(context(page.resource), page.text)}
File "/usr/lib/python2.5/site-packages/Trac-0.11.1-py2.5.egg/trac/wiki/formatter.py", line 1096, in format_to_html
  return HtmlFormatter(env, context, wikidom).generate(escape_newlines)
File "/usr/lib/python2.5/site-packages/Trac-0.11.1-py2.5.egg/trac/wiki/formatter.py", line 1055, in generate
  escape_newlines)
File "/usr/lib/python2.5/site-packages/Trac-0.11.1-py2.5.egg/trac/wiki/formatter.py", line 833, in format
  self.handle_code_block(line)
File "/usr/lib/python2.5/site-packages/Trac-0.11.1-py2.5.egg/trac/wiki/formatter.py", line 779, in handle_code_block
  self.code_processor = WikiProcessor(self, name, args)
File "/usr/lib/python2.5/site-packages/Trac-0.11.1-py2.5.egg/trac/wiki/formatter.py", line 96, in __init__
  for macro_name in macro_provider.get_macros():
File "build/bdist.linux-i686/egg/graphviz/graphviz.py", line 218, in get_macrosFile "build/bdist.linux-i686/egg/graphviz/graphviz.py", line 496, in _load_configFile "/usr/lib/python2.5/posixpath.py", line 171, in exists
  st = os.stat(path)

System Information:

User Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3
Trac: 	0.11.1
Python: 	2.5.2 (r252:60911, Sep 29 2008, 21:31:01) [GCC 4.3.2]
setuptools: 	0.6c8
SQLite: 	3.5.9
pysqlite: 	2.3.2
Genshi: 	0.5.1
mod_python: 	3.3.1
Subversion: 	1.5.1 (r32289)
jQuery:	1.2.6