[bira]

Parker what version are you on?!?

The vinyl code for 2.2.1 in forumdisplay.php is (lines 307-314):

// look at thread limiting options
$datecut="";
$stickyids="";
$stickycount=0;
if ($daysprune!=1000) {
  $checkdate = time() - ($daysprune*86400);
  $datecut='AND lastpost >= '.$checkdate;
}

// get number of sticky threads for the first page
// on the first page there will be the sticky threads PLUS the $perpage other normal threads
// not quite a bug, but a deliberate feature!
if ($pagenumber==1) {
	$datecut.=' AND sticky=0';

Adding the lastvisit option would change it to:

// look at thread limiting options
$datecut="";
$stickyids="";
$stickycount=0;
if ($daysprune!=1000) {
[high]    if ($daysprune=='-2') {
        $datecut='AND lastpost >= '.$bbuserinfo[lastvisit];	
    } else {[/high]
        $checkdate = time() - ($daysprune*86400);
        $datecut='AND lastpost >= '.$checkdate;
    [high]}[/high]
}

// get number of sticky threads for the first page
// on the first page there will be the sticky threads PLUS the $perpage other normal threads
// not quite a bug, but a deliberate feature!
if ($pagenumber==1) {
	$datecut.=' AND sticky=0';

(change hilighted)