PHP Warning: Call-time pass-by-reference has been deprecated in class.ajax.php(addon)

I've been receiving more than a few 500 errors recently so I thought I'd run a php debug and here's what I've found.
Not sure if the error in this log is what's causing the 500 but I may as well fix it.

[17-Aug-2010 08:25:01] PHP Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of in_array(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in D:\Hosting\5096134\html\includes\classes\class.ajax.php on line 389

and here is what I see from ling 377-399.
Should I try, as suggested in the log and set the return false; to return true; ??

function recursiveInArray($needle, $haystack) {
	    foreach ($haystack as $key => $stalk) {
	        if (($key === $needle) || ($needle === $stalk) || (is_array($stalk) && $this->recursiveInArray($needle, $stalk))) {
	            return true;
	        }
	    }
		return false;
	}
}

function print_nice($elem,$max_level=10,$print_nice_stack=array()){
    if(is_array($elem) || is_object($elem)){
        if(in_array(&$elem,$print_nice_stack,true)){
            echo "<font color=red>RECURSION</font>";
            return;
        }
        $print_nice_stack[]=&$elem;
        if($max_level<1){
            echo "<font color=red>nivel maximo alcanzado</font>";
            return;
        }

Thank you!

\includes\classes\class.ajax.phpThe file \includes\classes\class.ajax.php is not part of any current version of Zen Cart, so it must be something you've added, either from your own coding or from an addon.

DrByte:

The file \includes\classes\class.ajax.php is not part of any current version of Zen Cart, so it must be something you've added, either from your own coding or from an addon.
You are correct, both JQZoom and JQlightbox use ajax.
Guess I'll head over there for more answers.

Thanks