Redmine

I'm trying upgrade from 0.8, but when I login or access any projet, appear the following error:

Processing ProjectsController#show (for 201.67.214.109 at 2011-06-30 10:34:40) [GET]
Parameters: {"action"=>"show", "id"=>"aguiabusiness", "controller"=>"projects"}

ActiveRecord::StatementInvalid (Mysql::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AND projects.rgt < ))) AND issue_statuses.is_closed=0) AND (((projects.status=1 ' at line 1: SELECT count(DISTINCT `issues`.id) AS count_all, tracker_id AS tracker_id FROM `issues` LEFT OUTER JOIN `projects` ON `projects`.id = `issues`.project_id LEFT OUTER JOIN `issue_statuses` ON `issue_statuses`.id = `issues`.status_id LEFT OUTER JOIN `trackers` ON `trackers`.id = `issues`.tracker_id WHERE (((projects.id = 26 OR (projects.lft > AND projects.rgt < ))) AND issue_statuses.is_closed=0) AND (((projects.status=1 AND projects.id IN (SELECT em.project_id FROM enabled_modules em WHERE em.name='issue_tracking')) AND ((projects.is_public = 1 AND ((issues.is_private = 0 OR issues.author_id = 2 OR issues.assigned_to_id = 2)))))) GROUP BY tracker_id ):

My environment:

About your application's environment
Ruby version 1.8.7 (i486-linux)
RubyGems version 1.3.5
Rack version 1.1.2
Rails version 2.3.11
Active Record version 2.3.11
Active Resource version 2.3.11
Action Mailer version 2.3.11
Active Support version 2.3.11
Application root /home/mrnet/domains/redmine
Environment production
Database adapter mysql
Database schema version 20110511000000

I'm using the trunk version.