restful_authentication falling tests, allowing blank passwords

All, I'm a bit of a journeyman when it comes to RoR, and I've been
having one issue setting up restful_authentication that's making me
batty. I got most of my direction from the README and Ryan Bates'
railscast[1], but every time I set up an authentication system with
rails 2.0.2, users are failing one of their unit tests:

    1) Failure:
    test_should_require_password(UserTest)
        [test/unit/user_test.rb:31:in `test_should_require_password'
         /Applications/Locomotive2/Bundles/
rmagickRailsDec2007_i386.locobundle/framework/lib/ruby/gems/1.8/gems/
activesupport-2.0.2/lib/active_support/core_ext/test/unit/
assertions.rb:39:in `assert_difference'
         /Applications/Locomotive2/Bundles/
rmagickRailsDec2007_i386.locobundle/framework/lib/ruby/gems/1.8/gems/
activesupport-2.0.2/lib/active_support/core_ext/test/unit/
assertions.rb:58:in `assert_no_difference'
         test/unit/user_test.rb:29:in `test_should_require_password']:
    <nil> is not true.

This basically allows a you to create a new user with a blank
password. I threw some logger statements into my model, and this is
what I'm seeing when the test runs:

    === called password_required?
    crypted: 'NULL'
    crypted blank: false
    password:
    password blank: true
    password nil: true
    result: false

A bit of an update... changing `password_required?` to

    def password_required?
      crypted_password.blank? || crypted_password == "'NULL'" || !
password.blank?
    end

Allows all restful_authentication tests to pass, even the functional
tests. This still seems a bit odd. Anyone have any thoughts?