Redmine

About your application's environment
Ruby version              1.8.7 (i486-linux)
RubyGems version          1.3.6
Rack version              1.0
Rails version             2.3.5
Active Record version     2.3.5
Active Resource version   2.3.5
Action Mailer version     2.3.5
Active Support version    2.3.5
Edge Rails revision       unknown
Application root          /var/www/redmine
Environment               production
Database adapter          mysql
Database schema version   20100920163036

About your Redmine plugins
Stuff To Do Plugin          0.4.0
Redmine My Widgets plugin   0.1.0
Messenger Plugin            0.0.9
Scrumdashboard plugin       1.2
Redmine Charts              0.1.0
Redmine Schedules plugin    0.4.2
Mylyn Connector plugin      2.7.0.stable.RC3
Redmine Todo Lists plugin   0.0.4.1
Redmine Backlogs            master branch (unstable)
Timesheet Plugin            0.5.0

this is the erro that I get when I click on "View all issues" in /my/page

Processing IssuesController#index (for 10.15.12.97 at 2010-10-29 14:47:00) [GET]
  Parameters: {"set_filter"=>"1", "action"=>"index", "assigned_to_id"=>"me", "controller"=>"issues", "sort"=>"priority:desc,updated_on:desc"}
Rendering template within layouts/base
Rendering issues/index.rhtml

ActionView::TemplateError (undefined method `module_enabled?' for nil:NilClass) on line #14 of app/views/issues/_sidebar.rhtml:
11: <% if User.current.allowed_to?(:view_gantt, @project, :global => true) %>
12:     <%= link_to(l(:label_gantt), :controller => 'gantts', :action => 'show', :project_id => @project) %><br />
13: <% end %>
14: <%= call_hook(:view_issues_sidebar_planning_bottom) %>
15: 
16: <% unless sidebar_queries.empty? -%>
17: <h3><%= l(:label_query_plural) %></h3>

    lib/redmine/hook.rb:63:in `send'
    lib/redmine/hook.rb:63:in `call_hook'
    lib/redmine/hook.rb:63:in `each'
    lib/redmine/hook.rb:63:in `call_hook'
    lib/redmine/hook.rb:60:in `call_hook'
    lib/redmine/hook.rb:144:in `call_hook'
    app/views/issues/_sidebar.rhtml:14:in `_run_rhtml_app47views47issues47_sidebar46rhtml_locals_object_sidebar'
    app/views/issues/index.rhtml:77:in `_run_rhtml_app47views47issues47index46rhtml'
    app/helpers/application_helper.rb:816:in `content_for'
    app/views/issues/index.rhtml:76:in `_run_rhtml_app47views47issues47index46rhtml'
    app/controllers/issues_controller.rb:84:in `index'
    app/controllers/issues_controller.rb:83:in `index'

Rendering /var/www/redmine/public/500.html (500 Internal Server Error)

the same eerror appears with every other link under the /issues controller (so, even with no filters at all).
Don't know if it's related to the redmine core or to some plugin (I can't understand from the log)