jos-Error: PHP regular expression limit reached (pcre.backtrack_limit)

JSite -> render() @ /var/www/index.php:48
JApplication -> triggerEvent() @ /var/www/includes/application.php:274
JDispatcher -> trigger() @ /var/www/libraries/joomla/application/application.php:642
JEvent -> update() @ /var/www/libraries/joomla/event/dispatcher.php:161
call_user_func_array() @ /var/www/libraries/joomla/event/event.php:71
plgSystemSef -> onAfterRender()
plgSystemSef -> checkBuffer() @ /var/www/plugins/system/sef/sef.php:53
JError :: raiseError() @ /var/www/plugins/system/sef/sef.php:89
JError :: raise() @ /var/www/libraries/joomla/error/error.php:251