invalid multibyte character (ArgumentError)

http://forums.netbeans.org/topic16574.html
参照

C:\Program Files\NetBeans 6.8\etc\netbeans.conf
に

-J-Druby.no.kcode=true

を追加

し
以下のエラーを解決

=> Booting WEBrick
=> Rails 2.3.5 application starting on http://0.0.0.0:3000
C:/Ruby19/lib/ruby/gems/1.9.1/gems/tmail-1.2.7.1/lib/tmail/utils.rb:117:in `<module:TextUtils>': invalid multibyte character (ArgumentError)
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/tmail-1.2.7.1/lib/tmail/utils.rb:110:in `<module:TMail>'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/tmail-1.2.7.1/lib/tmail/utils.rb:53:in `<top (required)>'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `block in require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/tmail-1.2.7.1/lib/tmail/interface.rb:36:in `<top (required)>'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `block in require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/tmail-1.2.7.1/lib/tmail/mail.rb:34:in `<top (required)>'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `block in require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/tmail-1.2.7.1/lib/tmail.rb:2:in `<top (required)>'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `block in require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionmailer-2.3.5/lib/action_mailer/vendor/tmail.rb:13:in `<top (required)>'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `block in require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionmailer-2.3.5/lib/action_mailer.rb:62:in `<top (required)>'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `block in require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/rails-2.3.5/lib/initializer.rb:268:in `block in require_frameworks'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/rails-2.3.5/lib/initializer.rb:268:in `each'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/rails-2.3.5/lib/initializer.rb:268:in `require_frameworks'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/rails-2.3.5/lib/initializer.rb:134:in `process'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/rails-2.3.5/lib/initializer.rb:113:in `run'
        from Z:/src/ruby/Training2/config/environment.rb:9:in `<top (required)>'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `block in require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
        from C:/Ruby19/lib/ruby/gems/1.9.1/gems/rails-2.3.5/lib/commands/server.rb:84:in `<top (required)>'
        from script/server:3:in `require'
        from script/server:3:in `<main>'