I changed "Anonymous" from "Author" to "no access", but that just forced me to login right when you pull up the Active Sites initial page.
ACLs are identical on each server (Windows & Linux).
I did notice every time I try to login with any user account I get "openWebPage: Invalid universal id at 23" error message emailed to me via the error agent. I'm not sure what kind of problem this is, could it be a security issue? On this same server (Linux) I'm running DomBulletin without any problems.
Thanks for responding to my questions.