Where do your users click "Logout", on the CB_Login module? In the module properties, what is the Logout Redirection URL set to? I have mine set to a slash "/" since I want them to go to the home page on logout.
Yes, the CB_Login module. I went and checked the settings on the Logout Redirection and it was pointed to simply "index.php" -- I changed it to "/index.php" and all is well now.