После установки zabbix-phpfrontend-engine-1.8-alt1.svn.9232, в /var/log/httpd2/error_log наблюдаю ошибки вида: [error] [client 127.0.0.1] PHP Fatal error: Call to undefined function mb_internal_encoding() in /var/www/webapps/zabbix/frontends/php/include/classes/class.cjson.php on line 231 Лечастя установкой php5-mbstring.
apt-get install zabbix-phpfrontend-php5