title: mb_convert_case undefined function (Symfony2 FOS/UserBundle)
body: <p>On my Symfony2 application, I am receiving an error:</p>
  
  <blockquote>
    <p>Fatal error: Call to undefined function FOS\UserBundle\Util\mb_convert_case() in /Applications/MAMP/htdocs/application/vendor/bundles/FOS/UserBundle/Util/Canonicalizer.php on line 18</p>
  </blockquote>
  
  <p>I am using PHP 5.3.6.</p>
  
  <p>Here is my PHPInfo showing that mbstring is enabled:</p>
  
  <p><a href="http://i.stack.imgur.com/FCMDv.png">http://i.stack.imgur.com/FCMDv.png</a></p>
  
  <p>If mbstring is enabled then why is mb_convert_case not being found?</p>