HTTP Error 500 on Google Chrome, Blank on Iceweasel

[eluser]fredmanglis[/eluser]
Thanks @satej for your response. I am not using any other APIs, at least, not any that I am aware of.

My setup is on a personal machine with Apache/2.2.22 on Debian 7 (Wheezy), with PHP 5.4.4-9.
I have placed the "CodeIgniter_2.1.3/" directory in the "/var/www/" directory.

I am not aware of anything else that could be the problem. After setting the log_threshold=4; (ALL), I get the following output:

Code:

<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed'); ?>;

DEBUG - 2012-11-23 15:52:58 --> Config Class Initialized
DEBUG - 2012-11-23 15:52:58 --> Hooks Class Initialized
DEBUG - 2012-11-23 15:52:58 --> Utf8 Class Initialized
DEBUG - 2012-11-23 15:52:58 --> UTF-8 Support Enabled
DEBUG - 2012-11-23 15:52:58 --> URI Class Initialized
DEBUG - 2012-11-23 15:52:58 --> Router Class Initialized
DEBUG - 2012-11-23 15:52:58 --> No URI present. Default controller set.
DEBUG - 2012-11-23 15:52:58 --> Output Class Initialized
DEBUG - 2012-11-23 15:52:58 --> Security Class Initialized
DEBUG - 2012-11-23 15:52:58 --> Input Class Initialized
DEBUG - 2012-11-23 15:52:58 --> Global POST and COOKIE data sanitized
DEBUG - 2012-11-23 15:52:58 --> Language Class Initialized
DEBUG - 2012-11-23 15:52:58 --> Loader Class Initialized
DEBUG - 2012-11-23 15:52:58 --> Controller Class Initialized
DEBUG - 2012-11-23 15:52:58 --> File loaded: application/views/templates/header.php
DEBUG - 2012-11-23 15:52:58 --> File loaded: application/views/pages/home.php
DEBUG - 2012-11-23 15:52:58 --> File loaded: application/views/templates/footer.php
DEBUG - 2012-11-23 15:52:58 --> Final output sent to browser
DEBUG - 2012-11-23 15:52:58 --> Total execution time: 0.0168
DEBUG - 2012-11-23 15:53:11 --> Config Class Initialized
DEBUG - 2012-11-23 15:53:11 --> Hooks Class Initialized
DEBUG - 2012-11-23 15:53:11 --> Utf8 Class Initialized
DEBUG - 2012-11-23 15:53:11 --> UTF-8 Support Enabled
DEBUG - 2012-11-23 15:53:11 --> URI Class Initialized
DEBUG - 2012-11-23 15:53:11 --> Router Class Initialized
DEBUG - 2012-11-23 15:53:11 --> Output Class Initialized
DEBUG - 2012-11-23 15:53:11 --> Security Class Initialized
DEBUG - 2012-11-23 15:53:11 --> Input Class Initialized
DEBUG - 2012-11-23 15:53:11 --> Global POST and COOKIE data sanitized
DEBUG - 2012-11-23 15:53:11 --> Language Class Initialized
DEBUG - 2012-11-23 15:53:11 --> Loader Class Initialized
DEBUG - 2012-11-23 15:53:11 --> Controller Class Initialized
DEBUG - 2012-11-23 15:53:11 --> Model Class Initialized
DEBUG - 2012-11-23 15:53:11 --> Database Driver Class Initialized