[Xenon]

as i told ya in my pm your part of editpost.php is wrong:

PHP Code:

$lastpost = $DB_site->query_first("SELECT * FROM post WHERE threadid = '$threadid' ORDER BY postid DESC"); 


because the newest post is always the last post of a thread
you must use a query one post before:

PHP Code:

$lastpost = $DB_site->query_first("SELECT * FROM post WHERE threadid = '$threadid' AND postid<$postid ORDER BY postid DESC"); 


i think that should be right...