I'm still a beginner with WordPress, but just for fun, I've been trying to learn more and installed 3.0. I have multisite enabled and running. However, after I created a test site from the site admin, I click 'visit' to check it out, and I get an 'Authentication Required' prompt that will not accept any user credentials from the main site, even the super admin login. It just keeps popping back up and if I click 'cancel' I get a "you are not authorized page."
I would really appreciate any suggestions or even a "Hey, Dummy. Go read this first" type of link.