[eluser]sqwk[/eluser]
Found the problem. It was a matter of moving the Input part behind the Unicode part in Codeigniter.php like so: (Not the other way around like it was in the patch file.)
Code:
/*
* ------------------------------------------------------
* Instantiate the Unicode class
* ------------------------------------------------------
*
* Note: Order here is rather important as the Unicode
* class needs to be used very early on, but it cannot
* properly determine if UTf-8 can be supported until
* after the Config class is instantiated.
*
*/
$UNI =& load_class('Unicode', 'core');
/*
* ------------------------------------------------------
* Load the Input class and sanitize globals
* ------------------------------------------------------
*/
$IN =& load_class('Input', 'core');
Oh, and querystrings started working too… Happy days…