[RedTyger]

Excellent detective work, that certainly is the problem. Try this, I can't test it at the moment:

FIND:

function refreshad_js($adcode_name, $file, $is_bit = false, $setting_name = '')

REPLACE WITH:

function refreshad_js($adcode_name, $file, $is_bit = 'false', $setting_name = '')

FIND:

// Avoid getting stuck in a loop if the value is no good.
if ($vbulletin->options['vbam_'.$setting_name.'_refresh'] < 10)
{
	return false;
}

BELOW, ADD:

// Force boolean string conversion more effectively.
if ($is_bit !== 'false')
{
	$is_bit = 'true';
}

FIND:

'.(string) $is_bit.'

REPLACE WITH:

"'.$is_bit.'"