I noticed an error in the March 2007 correction listing and thought it might cause some grief for anyone going through the book. This has to do with the functional tests in chapter 7.

The listing was correct in the book however it is shown in the corrections page as follows:

Code:
def test_should_redirect_after_vote_with_get
  get :vote, :id => 2
  assert_redirected_to :action => 'show',
      :id => 'sitepoint-forums'
end
Will throw an error because :id is not a string but 'sitepoint-forums' is. It's a number. The correct listing is as follows (same as in the book):

Code:
def test_should_redirect_after_vote_with_get
      get :vote, :id => 2
      assert_redirected_to :action => 'show', 
            :permalink => 'sitepoint-forums'
  end