title: cake 1.3 - cache does not load models
body: <p>in my users_controller i have:</p>
  
  <pre><code>var $uses = array('User', ...);
  function dosomething() {
    $this-&gt;User-&gt;findById($someId);
    ...
  }
  </code></pre>
  
  <p>it works fine for about an hour, after that, i have error:</p>
  
  <pre><code>PHP Fatal error:  Call to a member function findById() on a non-object
  </code></pre>
  
  <p>when i make <code>dump($this)</code> it shows me that <code>$this-&gt;User</code> is only an empty string.</p>
  
  <p>after i delete all files from TMP.'cache' it works fine for another hour.
  if i'll disable cache it works fine all the time</p>
  
  <p>i've tried</p>
  
  <p><code>Cache::config('default', array('engine' =&gt; 'File'));</code></p>
  
  <p>and </p>
  
  <p><code>Cache::config('default', array('engine' =&gt; 'APC'));</code> </p>
  
  <p>it works the same.</p>
  
  <p>unfortunately i need cache, so please help me</p>