On an installation I'm doing I wanted to see what a new registrant would see, then see what they see when "I" promote them to different groups. So I created a new user for each group. I then opened IE(7) and logged in as "group4". I saw it and it was good. I then clicked the 'logout' button in the toolbar. As one would expect, I was taken to the blog and did not see the toolbar.
I then manually put domain.com/admin.php in the address bar, and "group4" was logged in again.
I LOGGED OUT! But IE7 still remembers me. This, to me, makes no sense. Doesn't logging out delete the cookie? Therefore this is either a gross bug or a totally gross EdB error.