Please refer changes for Ruby on Rails 3.1.3. http://guides.rubyonrails.org/3_1_release_notes.html http://weblog.rubyonrails.org/2011/8/31/rails-3-1-0-has-been-released http://weblog.rubyonrails.org/2011/10/7/ann-rails-3-1-1 http://weblog.rubyonrails.org/2011/11/18/rails-3-1-2-has-been-released http://weblog.rubyonrails.org/2011/11/20/rails-3-1-3-has-been-released
