Please be aware that the Restful_Authentication plugin has changed significantly from the version used in the book and is no longer compatible with Rails 1.2

It is recommended that reader either copy the version of the plugin that’s included with the source code for this application into their own application or check out the previous version directly from subversion using a command like:

svn export -r 2563 http://svn.techno-weenie.net/projects/plugins/restful_authentication <my directory>/vendor/plugins/restful_authentication

Thanks to SteveM for researching the specific release of restful_authentication to use and sharing this tip with other readers