title: CakePHP ACL/ACO errors
body: <p>I get the following error when viewing my home page for my CakePHP website:</p>
  
  <pre><code>Warning (512): DbAcl::check() - Failed ARO/ACO node lookup in permissions check.  Node references:
  Aro: Array
  (
      [User] =&gt; Array
          (
              [id] =&gt; 1
              [username] =&gt; admin@test.com
              [group_id] =&gt; 1
              [created] =&gt; 2008-07-05 17:16:58
              [modified] =&gt; 2008-07-05 17:16:58
          )
  
  )
  
  Aco: controllers/Pages/display [CORE/cake/libs/controller/components/acl.php, line 273]
  Warning (2): Cannot modify header information - headers already sent by (output started at /Users/cameron/Sites/cakeapp/cake/libs/debugger.php:673) [CORE/cake/libs/controller/controller.php, line 742]
  </code></pre>
  
  <p>What is the problem(s)? Thanks</p>