TypeError in User/user#sign_up_person

Showing user/sign_up_person.html.erb where line #3 raised:

can't convert nil into String
Extracted source (around line #3):

1: <h2>Sign up</h2>
2: <% standard_form_for :person do |f| %>
3:   <%= errors_for :person %>
4:   <%= render :partial => 'login_data', :locals => { :f => f } %>
5:   <%= render :partial => 'person_data', :locals => { :f => f } %>
6:   <%= render :partial => 'user_agreement', :locals => { :f => f } %>
RAILS_ROOT: /Users/teamon/Sites/polecamy

Application Trace | Framework Trace | Full Trace
vendor/plugins/globalize/lib/globalize/rails/active_record.rb:44:in `+'
vendor/plugins/globalize/lib/globalize/rails/active_record.rb:44:in `full_messages'
vendor/plugins/globalize/lib/globalize/rails/active_record.rb:36:in `each'
vendor/plugins/globalize/lib/globalize/rails/active_record.rb:36:in `full_messages'
vendor/plugins/globalize/lib/globalize/rails/active_record.rb:35:in `each_key'
vendor/plugins/globalize/lib/globalize/rails/active_record.rb:35:in `full_messages'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_view/helpers/active_record_helper.rb:152:in `errors_for'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_view/helpers/active_record_helper.rb:152:in `map'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_view/helpers/active_record_helper.rb:152:in `errors_for'
app/views/user/sign_up_person.html.erb:3:in `_run_erb_47app47views47user47sign_up_person46html46erb'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_view/helpers/form_helper.rb:248:in `fields_for'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_view/helpers/form_helper.rb:184:in `form_for'
app/helpers/application_helper.rb:11:in `standard_form_for'
app/views/user/sign_up_person.html.erb:2:in `_run_erb_47app47views47user47sign_up_person46html46erb'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_view/base.rb:637:in `send'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_view/base.rb:637:in `compile_and_render_template'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_view/base.rb:365:in `render_template'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_view/base.rb:316:in `globalize_old_render_file'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:1100:in `render_for_file'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:836:in `render_with_no_layout'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/layout.rb:262:in `render_without_benchmark'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:51:in `render'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:51:in `render'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:1153:in `default_render'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:1159:in `perform_action_without_filters'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/filters.rb:697:in `call_filters'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/filters.rb:689:in `perform_action_without_benchmark'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/rescue.rb:199:in `perform_action_without_caching'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/caching.rb:678:in `perform_action'
/Library/Ruby/Gems/1.8/gems/activerecord-2.0.2/lib/active_record/connection_adapters/abstract/query_cache.rb:33:in `cache'
/Library/Ruby/Gems/1.8/gems/activerecord-2.0.2/lib/active_record/query_cache.rb:8:in `cache'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/caching.rb:677:in `perform_action'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:524:in `send'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:524:in `process_without_filters'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/filters.rb:685:in `process_without_session_management_support'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/session_management.rb:123:in `process'
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:388:in `process'
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:489:in `load'
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:489:in `load'
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in'
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:489:in `load'
/Library/Ruby/Gems/1.8/gems/rails-2.0.2/lib/commands/servers/mongrel.rb:64
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in'
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
/Library/Ruby/Gems/1.8/gems/rails-2.0.2/lib/commands/server.rb:39
Request

Parameters:

{"authenticity_token"=>"286e9ca945f4849456113cb75c524df3b722f918",
 "person"=>{"city"=>"",
 "user_agreement"=>"0",
 "www"=>"",
 "postcode"=>"",
 "password_confirmation"=>"",
 "captcha"=>"",
 "captcha_key"=>"1fefb4382d55ea9523cfc72f825269b7ebde7da2",
 "street"=>"",
 "phone"=>"",
 "first_name"=>"",
 "password"=>"",
 "last_name"=>"",
 "email"=>""}}
Show session dump

Response

Headers:

{"cookie"=>[],
 "Cache-Control"=>"no-cache"}