[bira]

baratator,

Try adding, in admin/functions.php, the highlighted bit below:

// Contract Old Posts in Thread (v1.0)
	global $display, [high]$post[countpost],[/high] $HTTP_USER_AGENT;

	if ($post[dateline]>$bbuserinfo[lastvisit] and $post[countpost]=="0") {

See if this works. (cos it might be that $post[countpost] needs to be declared as global first).