今日はじめてTracをさわっております
私も同じエラーになりましたが、Revision 144: /plugins/ganttcalendarplugin/trunk から再チャレンジ！
.egg-cache/も一度消してGanttTicketに再アクセスすると、、、


Trac detected an internal error: TemplateNotFound:
Template "gantt.html" not found

File "/usr/lib/python2.3/site-packages/Trac-0.11.2.1.ja1-py2.3.egg/trac/web/main.py", line 432, in _dispatch_request
dispatcher.dispatch(req)
File "/usr/lib/python2.3/site-packages/Trac-0.11.2.1.ja1-py2.3.egg/trac/web/main.py", line 226, in dispatch
data, content_type)
File "/usr/lib/python2.3/site-packages/Trac-0.11.2.1.ja1-py2.3.egg/trac/web/chrome.py", line 687, in render_template
template = self.load_template(filename, method=method)
File "/usr/lib/python2.3/site-packages/Trac-0.11.2.1.ja1-py2.3.egg/trac/web/chrome.py", line 671, in load_template
return self.templates.load(filename, cls=cls)
File "/usr/lib/python2.3/site-packages/Genshi-0.5.1-py2.3-linux-i686.egg/genshi/template/loader.py", line 237, in load


私の知識では、お手上げでございます(´・ω・`)