Ошибка "PHP Warning: strtr()...."

Здравствуйте!

Очень давно мучаюсь с ошибкой:

[Tue Feb 10 17:33:58 2015] [warn] [client 66.249.75.102] mod_fcgid: stderr: PHP Warning:  strtr(): The second argument is not an array in ......./wp-content/plugins/recall/functions-rcl.php on line 695

[Tue Feb 10 17:34:22 2015] [warn] [client 66.249.75.118] mod_fcgid: stderr: PHP Warning:  strtr(): The second argument is not an array in ......./wp-content/plugins/rustolat/rus-to-lat.php on line 60

Примечательно то, что ошибка появляется только в еррор-логах форума, который расположен по адресу forum.site.ru (IPB) сам же сайт, как вы уже догадались, на Wordpress.

В обоих файлах содержится одинаковый контент для транслита, привожу пример из rus-to-lat.php on line 60

$gost = array(

   "Є"=>"EH","І"=>"I","і"=>"i","№"=>"#","є"=>"eh",

   "А"=>"A","Б"=>"B","В"=>"V","Г"=>"G","Д"=>"D",

   "Е"=>"E","Ё"=>"JO","Ж"=>"ZH",

   "З"=>"Z","И"=>"I","Й"=>"JJ","К"=>"K","Л"=>"L",

   "М"=>"M","Н"=>"N","О"=>"O","П"=>"P","Р"=>"R",

   "С"=>"S","Т"=>"T","У"=>"U","Ф"=>"F","Х"=>"KH",

   "Ц"=>"C","Ч"=>"CH","Ш"=>"SH","Щ"=>"SHH","Ъ"=>"'",

   "Ы"=>"Y","Ь"=>"","Э"=>"EH","Ю"=>"YU","Я"=>"YA",

   "а"=>"a","б"=>"b","в"=>"v","г"=>"g","д"=>"d",

   "е"=>"e","ё"=>"jo","ж"=>"zh",

   "з"=>"z","и"=>"i","й"=>"jj","к"=>"k","л"=>"l",

   "м"=>"m","н"=>"n","о"=>"o","п"=>"p","р"=>"r",

   "с"=>"s","т"=>"t","у"=>"u","ф"=>"f","х"=>"kh",

   "ц"=>"c","ч"=>"ch","ш"=>"sh","щ"=>"shh","ъ"=>"",

   "ы"=>"y","ь"=>"","э"=>"eh","ю"=>"yu","я"=>"ya",

   "—"=>"-","«"=>"","»"=>"","…"=>""

  );



$iso = array(

   "Є"=>"YE","І"=>"I","Ѓ"=>"G","і"=>"i","№"=>"#","є"=>"ye","ѓ"=>"g",

   "А"=>"A","Б"=>"B","В"=>"V","Г"=>"G","Д"=>"D",

   "Е"=>"E","Ё"=>"YO","Ж"=>"ZH",

   "З"=>"Z","И"=>"I","Й"=>"J","К"=>"K","Л"=>"L",

   "М"=>"M","Н"=>"N","О"=>"O","П"=>"P","Р"=>"R",

   "С"=>"S","Т"=>"T","У"=>"U","Ф"=>"F","Х"=>"X",

   "Ц"=>"C","Ч"=>"CH","Ш"=>"SH","Щ"=>"SHH","Ъ"=>"'",

   "Ы"=>"Y","Ь"=>"","Э"=>"E","Ю"=>"YU","Я"=>"YA",

   "а"=>"a","б"=>"b","в"=>"v","г"=>"g","д"=>"d",

   "е"=>"e","ё"=>"yo","ж"=>"zh",

   "з"=>"z","и"=>"i","й"=>"j","к"=>"k","л"=>"l",

   "м"=>"m","н"=>"n","о"=>"o","п"=>"p","р"=>"r",

   "с"=>"s","т"=>"t","у"=>"u","ф"=>"f","х"=>"x",

   "ц"=>"c","ч"=>"ch","ш"=>"sh","щ"=>"shh","ъ"=>"",

   "ы"=>"y","ь"=>"","э"=>"e","ю"=>"yu","я"=>"ya",

   "—"=>"-","«"=>"","»"=>"","…"=>""

  );

 

function sanitize_title_with_translit($title) {

	global $gost, $iso;

	$rtl_standard = get_option('rtl_standard');

	switch ($rtl_standard) {

		case 'off':

		    return $title;		

		case 'gost':

		    return strtr($title, $gost);

		default: 

		    return strtr($title, $iso);

	}

}

Строка 60 в данном случае return strtr($title, $iso); ругается на переменную $iso которая, якобы, не массив...

Что примечательно: [Tue Feb 10 17:33:58 2015] [warn] [client 66.249.75.102] - клиент всегда либо мой IP либо IP-адреса гуглобота.

Возможно это не критичная ошибка, но каждый день скапливается по 3+ Мб таких логов, а что с этим делать - понятия не имею.