fyi for people who find this thread: I had the same issue with undefined method `underscore', and my only solution was recreating my app from scratch, using this authlogic/rails3 template:
https://github.com/davidchua/authlogic-rails3-template -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.