[Logician]

Hack of Hack:

If you apply this modification, the popup announcement will popup once in every 12 hours:

Edit index.php, find (hack code):

PHP Code:

$dfh_announcement_popuptopaste = dynamic_a($dynamic_popup); 


REPLACE IT AS:

PHP Code:

$dfh_announcement_popuptopaste = dynamic_a($dynamic_popup);
if ($bbuserinfo[lastactivity]>0 AND $bbuserinfo[lastactivity]>mktime (date("H")-12, date("i"), date("s"), date("m"), date("d"), date("Y")))     {unset ($dfh_announcement_popuptopaste);} //popup once in every XX hours 


(Change 12 above if you want to apply a different popup duration.)