title: CodeIgniter - log error about sessions while using output cache
body: <p>I am using Phil Sturgeon's cache library -- <a href="http://getsparks.org/packages/cache/show" rel="nofollow">http://getsparks.org/packages/cache/show</a>.</p>
  
  <p>This works nicely - the only thing is that now I notice that each time a cached page is loaded, I get this message in my log:</p>
  
  <pre><code>The session cookie data did not match what was expected. This could be a possible hacking attempt.
  </code></pre>
  
  <p>My sessions are stored in the database. </p>
  
  <p>Does anyone have any pointer on what I should look into to solve this problem?</p>