I have just finished rails and gems upgrade and it was surprisingly smooth. There were just one minor issue. The server was not able to start. It was teling me something like: /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:266:in `load_missing_constant’: uninitialized constant Recconfig (NameError) from /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:452:in `const_missing’ from /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:464:in `const_missing’ from ./script/../config/../config/environment.rb:34 from /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/initializer.rb:41:in `run’ from ./script/../config/../config/environment.rb:15 from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require’ from… Continue reading Rails upgrade from 1.1.6 to 1.2.3