filecolumn無法上傳圖片問題(XP可以，ubuntu則不能)

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filecolumn無法上傳圖片問題(XP可以，ubuntu則不能)5

ruby版本 1.8.6
rails 版本 2.0.2

ubuntu 的環境
apache2+mod_rails
---------
在XP的時候使用filecolumn上傳圖片完全正常!!
但換到ubuntu之後則會出現無法顯示網頁
log寫的是RoutingError
目錄權限也設為可寫了

ActionController::RoutingError (No route matches "/product/p_image/34/" with {:method=>:get}):
    /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/routing.rb:1441:in `recognize_path'
    /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/routing.rb:1424:in `recognize'
    /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:170:in `handle_request'
    /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:115:in `dispatch'
    /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:126:in `dispatch_cgi'
    /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:9:in `dispatch'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/request_handler.rb:304:in `process_request'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/request_handler.rb:180:in `main_loop'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/application_spawner.rb:320:in `start_request_handler'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/application_spawner.rb:282:in `handle_spawn_application'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/application_spawner.rb:280:in `fork'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/application_spawner.rb:280:in `handle_spawn_application'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/application_spawner.rb:278:in `fork'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/application_spawner.rb:278:in `handle_spawn_application'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/abstract_server.rb:291:in `__send__'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/abstract_server.rb:291:in `main_loop'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/abstract_server.rb:147:in `start_synchronously'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/abstract_server.rb:114:in `start'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/abstract_server.rb:108:in `fork'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/abstract_server.rb:108:in `start'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/application_spawner.rb:147:in `start'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/framework_spawner.rb:278:in `handle_spawn_application'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/framework_spawner.rb:273:in `synchronize'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/framework_spawner.rb:273:in `handle_spawn_application'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/abstract_server.rb:291:in `__send__'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/abstract_server.rb:291:in `main_loop'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/abstract_server.rb:147:in `start_synchronously'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/abstract_server.rb:114:in `start'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/abstract_server.rb:108:in `fork'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/abstract_server.rb:108:in `start'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/framework_spawner.rb:104:in `start'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/spawn_manager.rb:106:in `spawn_application'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/spawn_manager.rb:102:in `synchronize'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/spawn_manager.rb:102:in `spawn_application'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/spawn_manager.rb:183:in `handle_spawn_application'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/abstract_server.rb:291:in `__send__'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/abstract_server.rb:291:in `main_loop'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/lib/passenger/abstract_server.rb:147:in `start_synchronously'
    /usr/lib/ruby/gems/1.8/gems/passenger-1.0.5/bin/passenger-spawn-server:32

Rendering /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/templates/rescues/layout.erb (not_found)

问题补充：
不是，是上传档案的时候
显示档案是完全没问题的
...

比较奇怪的是，有时候可以上传，有时候不能
不能的时候比较多

改用过mongrel也是相同的情形
甚至换了个插件upload_column情形也是一样的

但在win完全正常!

Rails