As pointed out else where in this forum, "start_form_tag" and "end_form_tag" are now just "form_tag".

Also, step #9, add "look" to the url and remove the ".html extension: http://localhost:3000/look/input so it agrees with the path step #6.

After these changes, I was able to get the example working on Mac OSX 10.6.2, Ruby 1.87, Rails 2.2.2.