Hi, I''m following the Agile Development With Rails book and having some trouble. Specifically, I''ve typed: % ruby script/generate scaffold Product Admin and received the following error: /usr/local//lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/hash/keys.rb:27:in `symbolize_keys'': undefined method `to_sym'' for #<YAML::Syck::MergeKey:0x23b2e48> (NoMethodError) I''ve got rail 1.1.2 and have done % sudo gem update rails --include-dependencies and been told that all is up to date. I''m on OSX 10.4.6 and I''m aware this can be temperamental, but I''d appreciate any suggestions as to what might be the problem (given that gems is telling my my installation is correct). thanks, donncha -- Posted via http://www.ruby-forum.com/.