Description:
------------
There is nothing much to describe actually. I call a function with:
die( hp_mail_wrapper('Subject', 'body') );

And my function looks like this:
function hp_mail_wrapper($title, $body, $theme = 0, $vars = array())
{
	if($theme == 'newsletter')
	{
		die('What???');
	}

	die('Good');
}

Strangely enough script dies with 'What???'. If I change $theme = 0 to anything else, like NULL, FALSE (anything), it works fine. I also dumped the incoming args to avoid reporting a sleepy-bug, but as expected, the only variables that function get is $title and $body.