Undefined property: CI_Loader::$theme after move from PHP4 -> PHP5

[eluser]WanWizard[/eluser]
Fixed the problem.

Turned out that for some reason CI_BASE (in Base5.php) was instantiated twice, which ruined the result of get_instance().

Solution:

Code:

public function CI_Base()
    {
        //
        // fix to make sure second instantiation doesn't ruin
        // the superobject pointer!
        //
        if ( ! isset(self::$instance) )
        {
            self::$instance =& $this;
        }
    }

which makes sure it is NEVER overwritten once defined. Now I only have to find the 'some reason'...