After migrating to phpSuExec it was no longer to utilise php_flag's in a .htaccess file, however, we could simply place a php.ini file and it'd work. Since we installed ZendOptimizer this ceased to work.. local php.ini files are no longer seen. According to Dan this is how PHP/Zend were designed and he's not aware of any work-around. Seeing as I'm sure we're not the only ones with this problem... I thought I'd post it here and see how/if you're dealing with it.