ACL + Auth = Headache

I followed the instructions here: http://book.cakephp.org/view/1543/Simple-Acl-controlled-Application
to learn how to setup ACL and Auth. My two test attempts went smoothly
and worked as expected. However, now that I am trying it for real its
failing. I get stuck in this redirect loop and I dont understand why.
No matter what valid URL I enter, I get a redirect loop.

This is the beforeFilter in my AppController:

function beforeFilter()
{
parent::beforeFilter();

//$this->Auth->allow(array('*'));

//Configure AuthComponent
$this->Auth->authorize = 'actions';
/*
* If the user did not select a controller/action before
logging in, then
* this controller/action willbe executed.
*/
$this->Auth->loginAction = array('controller' => 'users',
'action' => 'login');
/*
* Send the user here after logging out
*/
$this->Auth->logoutRedirect = array('controller' => 'users',
'action' => 'login');
/*
* Send the user here after logging in.
*/
$this->Auth->loginRedirect = array('controller' => 'main',
'action' => 'index');
}

Here are the login() and logout() methods for my users_controller

function login()
{
if ($this->Session->read('Auth.User'))
{

$this->Session->setFlash('You are logged in!');
$this->redirect($this->Auth->loginRedirect, null, false);
}
}

function logout()
{

exit('WTF');

$this->Session->setFlash('Good-Bye');
$this->redirect($this->Auth->logout());
}

I expect if I enter: http://swright-dev.epic-cake/users/logout I would
see "WTF" on the screen. I get redirected.

This is what I see repeated in my Apache access_log:
172.27.3.23 - - [06/Dec/2011:11:12:58 -0500] "GET / HTTP/1.1" 302 1
"-" "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:5.0) Gecko/20100101
Firefox/5.0"

Nothing is generated in the Apache error_log, or Cake's error and
debug logs.

The only way the redirect loop stops is if I uncomment this line in
the beforeFilter:
//$this->Auth->allow(array('*'));
But then no Auth works obviously. Can someone please point me in the
right direction?

Thanks.

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