@Jon, not sure how much ribbing to give you since I am not used to talking to you on the boards. But, we solved this problem on November 19, 2007. In what was probably the greatest day in AC board history, the post below was born. (excerpt). No more double logins. Maybe even more importantly, no more cookie issues as they crumbled into cyberspace and the infamous "Firewall" error message came up to haunt you just before you lost your five paragraph thread. This was particularly daunting for Paul who tends to write more than a sentence or two. Many of us learned to copy our post before sending.
I do think that November 19 will be declared National Amazing Charts Userboard Single Login Day.
http://www.amazingcharts.com/ub/ubbthreads.php/topics/3736/Double_login_detailed_version#Post3736
