[Xenon]

well, that can happen, but i can tell i'm right here, look at this for example from forumdisplay.php:

PHP Code:

          if ($userlastvisit<$forum['lastpost']) {
            $forum['onoff']='on';
          } else {
            $forum['onoff']='off';
          } 


that uses lastvisit for the forumicons

also in forumdisplay:

PHP Code:

$forumusers = $DB_site->query("SELECT username, invisible, userid
                        FROM user
                        WHERE  inforum = $foruminfo[forumid]
                            AND lastactivity > $datecut
                            AND lastvisit <> lastactivity"); 


here is uses lastactivity. it has nothing to do with the icons, just which users browse which forums.