1. No, we haven't PHP_AUTH_USER and PHP_AUTH_PW. We have just (as CGI standard) REMOTE_USER. And if REMOTE_USER is set, we know, that this user is authenticated by Apache (or by webseal in my case)
2. Yes. If the user set by REMOTE_USER doesn't exist in knowledgeroot, he is just allowed to see guest pages (or something similiar) or maybe nothing. New users will be administrated manually.
3. No. If this new feature is enabled, no normal login should work.
Uli