NameError (undefined local variable or method `root_url' for #<SessionsController:0xad4d03c>):
    /vendor/plugins/open_id_authentication/lib/open_id_authentication.rb:153:in `open_id_redirect_url'
    /vendor/plugins/open_id_authentication/lib/open_id_authentication.rb:112:in `begin_open_id_authentication'
    /vendor/plugins/open_id_authentication/lib/open_id_authentication.rb:98:in `authenticate_with_open_id'
    /app/controllers/sessions_controller.rb:101:in `open_id_authentication'
    /app/controllers/sessions_controller.rb:74:in `create'
    /vendor/rails/actionpack/lib/action_controller/base.rb:1187:in `send'
    /vendor/rails/actionpack/lib/action_controller/base.rb:1187:in `perform_action_without_filters'
    /vendor/rails/actionpack/lib/action_controller/filters.rb:617:in `call_filters'
    /vendor/rails/actionpack/lib/action_controller/filters.rb:638:in `run_before_filters'
    /vendor/plugins/slugger/lib/slugger.rb:50:in `i_dont_have_bloody_clue'
    /vendor/rails/activerecord/lib/../../activesupport/lib/active_support/callbacks.rb:178:in `send'
    /vendor/rails/activerecord/lib/../../activesupport/lib/active_support/callbacks.rb:178:in `evaluate_method'
    /vendor/rails/actionpack/lib/action_controller/filters.rb:186:in `call'
    /vendor/rails/actionpack/lib/action_controller/filters.rb:635:in `run_before_filters'
    /vendor/rails/actionpack/lib/action_controller/filters.rb:615:in `call_filters'
    /vendor/rails/actionpack/lib/action_controller/filters.rb:610:in `perform_action_without_benchmark'
    /vendor/rails/actionpack/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
    /opt/csw/lib/ruby/1.8/benchmark.rb:293:in `measure'
    /vendor/rails/actionpack/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
    /vendor/rails/actionpack/lib/action_controller/rescue.rb:205:in `perform_action_without_caching'
    /vendor/rails/actionpack/lib/action_controller/caching/sql_cache.rb:13:in `perform_action'
    /vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb:33:in `cache'
    /vendor/rails/activerecord/lib/active_record/query_cache.rb:8:in `cache'
    /vendor/rails/actionpack/lib/action_controller/caching/sql_cache.rb:12:in `perform_action'
    /vendor/rails/actionpack/lib/action_controller/base.rb:548:in `send'
    /vendor/rails/actionpack/lib/action_controller/base.rb:548:in `process_without_filters'
    /opt/csw/lib/ruby/1.8/monitor.rb:242:in `synchronize'
    /vendor/rails/actionpack/lib/action_controller/base.rb:548:in `process_without_filters'
    /vendor/rails/actionpack/lib/action_controller/filters.rb:606:in `process_without_session_management_support'
    /vendor/rails/actionpack/lib/action_controller/session_management.rb:130:in `process'
    /vendor/rails/actionpack/lib/action_controller/base.rb:409:in `process'
    /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:151:in `handle_request'
    /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:104:in `dispatch'
    /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:116:in `dispatch_cgi'
    /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:33:in `dispatch'
    /opt/csw/lib/ruby/gems/1.8/gems/thin-0.8.2/lib/rack/adapter/rails.rb:54:in `serve_rails'
    /opt/csw/lib/ruby/gems/1.8/gems/thin-0.8.2/lib/rack/adapter/rails.rb:74:in `call'
    /opt/csw/lib/ruby/gems/1.8/gems/thin-0.8.2/lib/thin/connection.rb:59:in `pre_process'
    /opt/csw/lib/ruby/gems/1.8/gems/thin-0.8.2/lib/thin/connection.rb:50:in `process'
    /opt/csw/lib/ruby/gems/1.8/gems/thin-0.8.2/lib/thin/connection.rb:35:in `receive_data'
    /opt/csw/lib/ruby/gems/1.8/gems/eventmachine-0.12.0/lib/eventmachine.rb:224:in `run_machine'
    /opt/csw/lib/ruby/gems/1.8/gems/eventmachine-0.12.0/lib/eventmachine.rb:224:in `run'
    /opt/csw/lib/ruby/gems/1.8/gems/thin-0.8.2/lib/thin/backends/base.rb:45:in `start'
    /opt/csw/lib/ruby/gems/1.8/gems/thin-0.8.2/lib/thin/server.rb:146:in `start'
    /opt/csw/lib/ruby/gems/1.8/gems/thin-0.8.2/lib/thin/controllers/controller.rb:79:in `start'
    /opt/csw/lib/ruby/gems/1.8/gems/thin-0.8.2/lib/thin/runner.rb:166:in `send'
    /opt/csw/lib/ruby/gems/1.8/gems/thin-0.8.2/lib/thin/runner.rb:166:in `run_command'
    /opt/csw/lib/ruby/gems/1.8/gems/thin-0.8.2/lib/thin/runner.rb:136:in `run!'
    /opt/csw/lib/ruby/gems/1.8/gems/thin-0.8.2/bin/thin:6
    /opt/csw/bin/thin:19:in `load'
    /opt/csw/bin/thin:19