ちなみに実行環境は Debian etch 上で↓のようになっております。 Todo$ script/about About your application's environment Ruby version 1.8.4 (i486-linux) RubyGems version 0.9.0 Rails version 1.1.6 Active Record version 1.14.4 Action Pack version 1.12.5 Action Web Service version 1.1.6 Action Mailer version 1.2.5 Active Support version 1.3.1 Application root /home/user/usr/src/ruby/Todo Environment development Database adapter sqlite3