URL Not Found when click Burndown menu

This is usual issue when Trac is not set as virtual host as this one server. Also occures when there are a number of Trac environments.

The folloing changes fixed this issue for me: changes to burndown.py:

• in the beginning add:

  from trac.util.html import html
  

• then change get_navigation_items definition:

      def get_navigation_items(self, req):
          if req.perm.has_permission("BURNDOWN_VIEW"):
              yield 'mainnav', 'burndown',
                     #Markup('<a href="%s">Burndown</a>', self.env.href.burndown())
                     html.a('Burndown', href=req.href.burndown(), accesskey=8)
  
  

Commented Markup can be removed from code completely.

here is patch for [2215]:

Index: burndown/burndown.py
===================================================================
--- burndown/burndown.py	(revision 2551)
+++ burndown/burndown.py	(working copy)
@@ -18,7 +18,8 @@
 from trac.perm import IPermissionRequestor
 from trac.web.chrome import INavigationContributor, ITemplateProvider, add_stylesheet
 from trac.web.main import IRequestHandler
-from trac.util import escape, Markup, format_date
+from trac.util import format_date
+from trac.util.html import html
 from trac.ticket import ITicketChangeListener
 
 class BurndownComponent(Component):
@@ -139,7 +140,8 @@
 
     def get_navigation_items(self, req):
         if req.perm.has_permission("BURNDOWN_VIEW"):
-            yield 'mainnav', 'burndown', Markup('<a href="%s">Burndown</a>', self.env.href.burndown())
+            yield('mainnav', 'burndown',
+                html.A('Burndown', href=req.href.burndown(), accesskey=8))
 
     #---------------------------------------------------------------------------
     # IPermissionRequestor methods

(hmm, diff macro doesn't work here in the same manner as in default trac 0.10.3, shame)

(In [4736]) Release of version 1.9 of the Trac Scrum burndown plugin. See http://stuq.nl/weblog/2008-11-04/scrum-burndown-plugin-19-released for more information.

The Scrum burndown plugin is currently compatible and tested with Trac 0.10.5, Trac 0.11.1, Python 2.4 and Python 2.5.

Issues fixed: Fixed #3498 Incompatible with Genshi 0.5 Fixed #1743 No support for 0.11 version on trac Fixed #2330 How to enable ScrumBurndownPlugin in 0.11b1 Fixed #1590 printing to stderr causes svn post-commit hook to crash Fixed #1510 Porting to Trac 0.11 and Genshi templates Fixed #2936 problem installing plugin Fixed #1668 Environment Not Found Fixed #1472 URL Not Found when click Burndown menu Fixed #3017 Trac 0.11 - Burndown Chart does not show tickets with status 'accepted'