jpmobileでtransit_sidを使うとエラーが出るようになった

ちょっと改変しすぎてどこからエラーで出したかわかんなくなっちゃったよ。。

2007-11-04 17:19:20.416964 ActionController::CgiRequest::SessionFixationAttempt
2007-11-04 17:19:20.416964 /xxxxx/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/cgi_process.rb:118:in `session'
2007-11-04 17:19:20.416964 /xxxxx/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/cgi_process.rb:164:in `stale_session_check!'
2007-11-04 17:19:20.416964 /xxxxx/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/cgi_process.rb:116:in `session'
2007-11-04 17:19:20.416964 /xxxxx/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:1058:in `assign_shortcuts_without_flash'
2007-11-04 17:19:20.416964 /xxxxx/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/flash.rb:140:in `assign_shortcuts'
2007-11-04 17:19:20.416964 /xxxxx/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:429:in `process_without_filters'
2007-11-04 17:19:20.416964 /xxxxx/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/filters.rb:684:in `process_without_session_management_support'
2007-11-04 17:19:20.416964 /xxxxx/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/session_management.rb:114:in `process'
2007-11-04 17:19:20.416964 /xxxxx/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:334:in `process'
2007-11-04 17:19:20.416964 /xxxxx/ruby/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/dispatcher.rb:41:in `dispatch'
2007-11-04 17:19:20.416964 dispatch.cgi:10

追記：railsのバージョンを1.2.3に戻したら動きました。
1.2.5には対応してないのね。