[Crazy Pete]

I can't figure out how to get Link14716's Newest Member's First Post! (v1.1) to work with this hack. It shows the member's first post for the first 10 minutes until the cache updates again, then it disappears and seems to pop back in at random. Any ideas? The query for the post is...

// get newest user's first post
if ($getnewestusers['lastpost']!=0){
$getnewusersposts=$DB_site->query_first("SELECT * FROM post WHERE userid=$newuserid LIMIT 1"); 
 $userfirstpost=$getnewusersposts['postid']; 
 
 if (!$getnewusersposts) {
 $firstpost="";
 } else {
 $firstpost=" | <a href='showthread.php?postid=$userfirstpost#post$userfirstpost'>First Post!</a>";
 }
}