[Dark Jim]

TECK, you need to fix your instructions a little.

This:
----------------------------------------
+-----------------------------------------------+
| Replace it with:
+--------------------------------------------------------------------------+
$lastposts=$DB_site->query_first("SELECT MAX(title) as title,MAX(lastpost) AS lastpost FROM thread WHERE forumid=$forumid AND visible=1 AND open<>10");
if ($lastposts['lastpost']>$lastpost) {
$lastposts=$DB_site->query_first("
SELECT lastpost,lastposter
FROM thread
WHERE forumid = $forumid AND lastpost = '$lastposts[lastpost]'");
$lastpost=$lastposts['lastpost'];
$lastthread=$lastposts['title'];
$lastposter=$lastposts['lastposter'];
}

$lastpostquery=",lastpost='$lastpost',lastthread=' ".addslashes($lastthread)."',lastposter='".addslas hes($lastposter)."'";
-----------------------------------

should be:

------------------------------------
+-----------------------------------------------+
| Replace it with:
+--------------------------------------------------------------------------+
$lastposts=$DB_site->query_first("SELECT MAX(title) as title,MAX(lastpost) AS lastpost FROM thread WHERE forumid=$forumid AND visible=1 AND open<>10");
if ($lastposts['lastpost']>$lastpost) {
$lastposts=$DB_site->query_first("
SELECT lastpost,lastposter,title
FROM thread
WHERE forumid = $forumid AND lastpost = '$lastposts[lastpost]'");
$lastpost=$lastposts['lastpost'];
$lastthread=$lastposts['title'];
$lastposter=$lastposts['lastposter'];
}

$lastpostquery=",lastpost='$lastpost',lastthread=' ".addslashes($lastthread)."',lastposter='".addslas hes($lastposter)."'";
----------------------------------------

Now updating works in the admin cp.