Ошибка
Thu Dec 17 19:25:49 2009] [error] [client 192.168.0.101]
PHP Warning: preg_match() [<a href='function.preg-match'>function.preg-match</a>]:
Internal pcre_fullinfo() error -3 in /usr/local/www/data-dist/joomla/libraries/joomla/application/application.php on line 405,
referer: http://192.168.0.100/joomla/
[Thu Dec 17 19:25:50 2009] [error] [client 192.168.0.101] PHP Fatal error:
Allowed memory size of 134217728 bytes exhausted at /usr/ports/lang/php5/work/php-5.2.11/Zend/zend_hash.c:247 (tried to allocate 40 bytes)
in /usr/local/www/data-dist/joomla/libraries/joomla/error/exception.php on line 117,
referer: http://192.168.0.100/joomla/

решение

опцию BUNDLED_PCRE включить для порта /usr/ports/devel/php5-pcre и пересобрать его