Redmine

the log:

Started GET "/issues/1524" for 111.120.15.194 at Sun Jan 06 17:04:14 +0800 2013
Processing by IssuesController#show as HTML
  Parameters: {"id"=>"1524"}
  Current user: huanglijuan (id=10)
  Rendered issues/_action_menu.html.erb (25.7ms)
  Rendered issues/show.html.erb within layouts/base (121.9ms)
Completed 500 Internal Server Error in 447ms

ActionView::Template::Error (undefined method `to_i' for ["10"]:Array):
    64:     rows.right l(:label_spent_time), (@issue.total_spent_hours > 0 ? (link_to l_hours(@issue.total_spent_hours), {:controller => 'timelog', :action => 'index', :project_id => @project, :issue_id => @issue}) : "-"), :class => 'spent-time'
    65:   end
    66: end %>
    67: <%= render_custom_fields_rows(@issue) %>
    68: <%= call_hook(:view_issues_show_details_bottom, :issue => @issue) %>
    69: </table>
    70: 
  lib/redmine/custom_field_format.rb:55:in `format_as_user'
  lib/redmine/custom_field_format.rb:36:in `send'
  lib/redmine/custom_field_format.rb:36:in `format'
  lib/redmine/custom_field_format.rb:101:in `format_value'
  app/helpers/issues_helper.rb:160:in `render_custom_fields_rows'
  app/helpers/issues_helper.rb:158:in `each'
  app/helpers/issues_helper.rb:158:in `render_custom_fields_rows'
  app/views/issues/show.html.erb:67:in `_app_views_issues_show_html_erb__1031787362_69887511903920'
  app/controllers/issues_controller.rb:119:in `show'
  app/controllers/issues_controller.rb:116:in `show'