[TECK]

hmm g-force, i just realised that the hack it's adding a query everywhere, in all pages. i really dont like that because i'm trying to stay with an average of max 18queries on my forums.

and you should use in your sessions.php something like:

$timeactive = time() - $bbuserinfo['lastactivity'];
if ($bbuserinfo['userid'] != 0 and $timeactive < (5 * 60)) {
  $DB_site->query("UPDATE user SET timeactivity=timeactivity+$timeactive WHERE userid='$bbuserinfo[userid]'");
}

so it doesnt perform a query also for quests. it will save you some serverload.

UPDATE
check below how to optimise the code and eliminate the extra query...
wait for g-force to update his files... or do it yourself if your belt is strong enough.