I haven't posted my 6.4 version yet.... but have been working on it.
That's what the "reauth" config variable should fix.
As sometiems it doesn't like doing the authenticate function twice.
Make sure that you put:
$config['reauth'] = '';
in the config file
Then that line in ubbt.inc php - try chaning this:
setcookie("$name","$value",$time,$cookiepath);
To this:
<br />if ($config['reauth'] != "1") {<br /> setcookie("$name","$value",$time,$cookiepath);<br />}<br />See if that fixes it.
