Redmine

Hello

Could someone tell me what is the problem?

Thanks
Erik

Processing WelcomeController#index (for 10.97.12.202 at 2011-07-15 07:54:54) [GET]
Parameters: {"action"=>"index", "controller"=>"welcome"}
Rendering template within layouts/base
Rendering welcome/index

ActionView::TemplateError (can't dup NilClass) on line #12 of app/views/layouts/base.rhtml:
9: <%= favicon >
10: <= stylesheet_link_tag 'application', :media => 'all' >
11: <= stylesheet_link_tag 'rtl', :media => 'all' if l(:direction) == 'rtl' >
12: <= javascript_heads >
13: <= heads_for_theme %>
14: <!--[if IE 6]>
15: <style type="text/css">

app/models/user_preference.rb:45:in `dup'
    app/models/user_preference.rb:45:in `[]='
    app/models/user_preference.rb:25:in `initialize'
    app/models/user.rb:250:in `new'
    app/models/user.rb:250:in `pref'
    app/helpers/application_helper.rb:895:in `javascript_heads'
    app/views/layouts/base.rhtml:12:in `_run_rhtml_app47views47layouts47base46rhtml'
    passenger (2.2.14) lib/phusion_passenger/rack/request_handler.rb:92:in `process_request'
    passenger (2.2.14) lib/phusion_passenger/abstract_request_handler.rb:207:in `main_loop'
    passenger (2.2.14) lib/phusion_passenger/railz/application_spawner.rb:441:in `start_request_handler'
    passenger (2.2.14) lib/phusion_passenger/railz/application_spawner.rb:381:in `handle_spawn_application'
    passenger (2.2.14) lib/phusion_passenger/utils.rb:252:in `safe_fork'
    passenger (2.2.14) lib/phusion_passenger/railz/application_spawner.rb:377:in `handle_spawn_application'
    passenger (2.2.14) lib/phusion_passenger/abstract_server.rb:352:in `__send__'
    passenger (2.2.14) lib/phusion_passenger/abstract_server.rb:352:in `main_loop'
    passenger (2.2.14) lib/phusion_passenger/abstract_server.rb:196:in `start_synchronously'
    passenger (2.2.14) lib/phusion_passenger/abstract_server.rb:163:in `start'
    passenger (2.2.14) lib/phusion_passenger/railz/application_spawner.rb:222:in `start'
    passenger (2.2.14) lib/phusion_passenger/spawn_manager.rb:262:in `spawn_rails_application'
    passenger (2.2.14) lib/phusion_passenger/abstract_server_collection.rb:126:in `lookup_or_add'
    passenger (2.2.14) lib/phusion_passenger/spawn_manager.rb:256:in `spawn_rails_application'
    passenger (2.2.14) lib/phusion_passenger/abstract_server_collection.rb:80:in `synchronize'
    passenger (2.2.14) lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
    passenger (2.2.14) lib/phusion_passenger/spawn_manager.rb:255:in `spawn_rails_application'
    passenger (2.2.14) lib/phusion_passenger/spawn_manager.rb:154:in `spawn_application'
    passenger (2.2.14) lib/phusion_passenger/spawn_manager.rb:287:in `handle_spawn_application'
    passenger (2.2.14) lib/phusion_passenger/abstract_server.rb:352:in `__send__'
    passenger (2.2.14) lib/phusion_passenger/abstract_server.rb:352:in `main_loop'
    passenger (2.2.14) lib/phusion_passenger/abstract_server.rb:196:in `start_synchronously'

Rendering /var/www/redmine-1.2.1/public/500.html (500 Internal Server Error)

About your application's environment
Ruby version 1.8.7 (i686-linux)
RubyGems version 1.3.7
Rack version 1.1
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
Edge Rails revision unknown
Application root /var/www/redmine-1.2.1
Environment production
Database adapter mysql
Database schema version 20110511000000