If you have been running WorPress MU for a while, you may not have seen some of the recent additions to values defined in wp-config.php. For single site WPMU installs, as of 2.6.1, you can save a couple of database and/or internal cache lookups by adding 3 defines to your wp-config.php: define(‘DOMAIN_CURRENT_SITE’, ‘domain.tld’ ); define(‘PATH_CURRENT_SITE’, [...]