Users report needing to sign out twice on certain browsers, particularly Internet Explorer (IE), due to issues with cookie management. While Firefox and Safari allow for a single logout, IE users, especially those on versions 6 and 7, frequently encounter problems that require multiple attempts. Some users suggest clearing cookies and adjusting URL prefixes as potential fixes. The logout issue appears inconsistent across different systems and browsers, leading to frustration among users. Overall, the discussion highlights ongoing challenges with forum logout functionality, particularly for IE users.