vaskoa

It will work fine if you replace:

// For tag clouds
function wp_tag_cloud_remove_title_attributes($return) {
	if (get_option('rta_from_tag_clouds') == 'on') {
		// N.B. This function uses single quotes
		$return = preg_replace("!title='(.+)'!", "", $return);
	}
	return $return;
}

with this:

// For tag clouds
function wp_tag_cloud_remove_title_attributes($return) {
	if (get_option('rta_from_tag_clouds') == 'on') {
		// N.B. This function uses single quotes
		$return = preg_replace("!title='([^']+)'!", "", $return);
	}
	return $return;
}