title: codeigniter not loading application/core files
body: <p>Got a problem with codeigniter with exteding the core. I build a website local and it workst perfect. Even when checking out on new machine or diferent php version ( tested on 5.3 and 5.2 ) it works normal. But when i upload it to my server it doesnt load the files in application/core. I get the error message:</p>
  
  <pre><code>Fatal error: Class 'LEAN_Controller' not found in /var/www/vhosts/website/subdomains/w8systeem/httpdocs/application/controllers/wachtlijsten/overzicht.php on line 3
  </code></pre>
  
  <p>When i ouput the loaded files like so:</p>
  
  <pre><code>print_r(get_included_files());
  </code></pre>
  
  <p>i get these results:
  localhost:</p>
  
  <pre><code>Array ( [0] =&gt; C:\wamp\www\website\index.php [1] =&gt;    
  C:\wamp\www\website\system\core\CodeIgniter.php [2] =&gt;    
  C:\wamp\www\website\system\core\Common.php [3] =&gt;    
  C:\wamp\www\website\application\config\constants.php [4] =&gt;     
  C:\wamp\www\website\system\core\Benchmark.php [5] =&gt;     
  C:\wamp\www\website\application\config\config.php [6] =&gt;     
  C:\wamp\www\website\system\core\Hooks.php [7] =&gt;     
  C:\wamp\www\website\system\core\Config.php [8] =&gt;     
  C:\wamp\www\website\system\libraries\Log.php [9] =&gt;     
  C:\wamp\www\website\system\core\Utf8.php [10] =&gt;     
  C:\wamp\www\website\system\core\URI.php [11] =&gt;     
  C:\wamp\www\website\system\core\Router.php [12] =&gt;     
  C:\wamp\www\website\application\config\routes.php [13] =&gt;     
  C:\wamp\www\website\system\core\Output.php [14] =&gt;     
  C:\wamp\www\website\application\config\mimes.php [15] =&gt;     
  C:\wamp\www\website\system\core\Security.php [16] =&gt;     
  C:\wamp\www\website\system\core\Input.php [17] =&gt;     
  C:\wamp\www\website\system\core\Lang.php [18] =&gt;     
  C:\wamp\www\website\system\core\Controller.php [19] =&gt;     
  C:\wamp\www\website\application\core\lean_controller.php [20] =&gt;     
  C:\wamp\www\website\application\controllers\wachtlijsten\overzicht.php )
  </code></pre>
  
  <p>server:</p>
  
  <pre><code>Array ( [0] =&gt; /var/www/vhosts/website/subdomains/w8systeem/httpdocs/index.php [1] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/system/core/CodeIgniter.php [2] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/system/core/Common.php [3] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/application/config/constants.php [4] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/system/core/Benchmark.php [5] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/application/config/config.php [6] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/system/core/Hooks.php [7] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/system/core/Config.php [8] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/system/libraries/Log.php [9] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/system/core/Utf8.php [10] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/system/core/URI.php [11] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/system/core/Router.php [12] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/application/config/routes.php [13] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/system/core/Output.php [14] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/application/config/mimes.php [15] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/system/core/Security.php [16] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/system/core/Input.php [17] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/system/core/Lang.php [18] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/system/core/Controller.php [19] =&gt;
   /var/www/vhosts/website/subdomains/w8systeem/httpdocs/application/controllers/wachtlijsten/overzicht.php ) 
  </code></pre>
  
  <p>I'm out of ideas. Dont know where to search further..</p>