diff -ubBr --exclude=uploads --exclude=images --exclude=images_pcf --exclude=config.php --exclude=languages --exclude=settings.php Upload/editpost.php forum/editpost.php
--- Upload/editpost.php	2006-07-28 04:29:52.000000000 +0200
+++ forum/editpost.php	2006-06-30 09:58:55.000000000 +0200
@@ -73,6 +73,11 @@
 {
 	nopermission();
 }
+// KK:
+$query = $db->query("SELECT MAX(pid) as lastpostpid FROM ".TABLE_PREFIX."posts WHERE tid='$tid'") ;
+$lastpost = $db->fetch_array($query);
+// KK^
+
 if($mybb->input['action'] == "deletepost" && $mybb->request_method == "post")
 {
 	if(ismod($fid, "candeleteposts") != "yes")
@@ -89,11 +94,18 @@
 		{
 			nopermission();
 		}
+// KK:
+		if ($lastpost['lastpostpid'] != $pid)
+		{
+			nopermission();
+		}
+// KK^
 	}
 }
 else
 {
-	if(ismod($fid, "caneditposts") != "yes") {
+	if(ismod($fid, "caneditposts") != "yes")
+	{
 		if($thread['closed'] == "yes") {
 			redirect("showthread.php?tid=$tid", $lang->redirect_threadclosed);
 		}
@@ -103,6 +115,12 @@
 		if($mybb->user['uid'] != $post['uid']) {
 			nopermission();
 		}
+// KK:
+		if ($lastpost['lastpostpid'] != $pid)
+		{
+			nopermission();
+		}
+// KK^
 		// Edit time limit
 		$time = time();
 		if($mybb->settings['edittimelimit'] != 0 && $post['dateline'] < ($time-($mybb->settings['edittimelimit']*60)))
diff -ubBr --exclude=uploads --exclude=images --exclude=images_pcf --exclude=config.php --exclude=languages --exclude=settings.php Upload/inc/functions_post.php forum/inc/functions_post.php
--- Upload/inc/functions_post.php	2006-07-28 04:29:52.000000000 +0200
+++ forum/inc/functions_post.php	2006-08-06 12:33:09.000000000 +0200
@@ -624,12 +628,14 @@
 			$post['editnote'] = sprintf($lang->postbit_edited, $post['editdate'], $post['edittime']);
 			eval("\$post['editedmsg'] = \"".$templates->get("postbit_editedby")."\";");
 		}
-		if((ismod($fid, "caneditposts") == "yes" || $mybb->user['uid'] == $post['uid']) && $mybb->user['uid'] != 0)
+//KK:		if((ismod($fid, "caneditposts") == "yes" || $mybb->user['uid'] == $post['uid']) && $mybb->user['uid'] != 0)
+		if((ismod($fid, "caneditposts") == "yes" || ($mybb->user['uid'] == $post['uid'] && $post['lastpostpid'] == $post['pid'])) && $mybb->user['uid'] != 0)
 		{
 			eval("\$post['button_edit'] = \"".$templates->get("postbit_edit")."\";");
 		}
 		// Quick Delete button
-		if((ismod($fid, "candeleteposts") == "yes" || $mybb->user['uid'] == $post['uid']) && $mybb->user['uid'] != 0)
+//KK:		if((ismod($fid, "candeleteposts") == "yes" || $mybb->user['uid'] == $post['uid']) && $mybb->user['uid'] != 0)
+		if((ismod($fid, "candeleteposts") == "yes" || ($mybb->user['uid'] == $post['uid'] && $post['lastpostpid'] == $post['pid'])) && $mybb->user['uid'] != 0)
 		{
 			eval("\$post['button_quickdelete'] = \"".$templates->get("postbit_quickdelete")."\";");
 		}
diff -ubBr --exclude=uploads --exclude=images --exclude=images_pcf --exclude=config.php --exclude=languages --exclude=settings.php Upload/showthread.php forum/showthread.php
--- Upload/showthread.php	2006-07-28 04:29:52.000000000 +0200
+++ forum/showthread.php	2006-08-20 12:02:58.000000000 +0200
@@ -420,6 +492,10 @@
 			error($lang->error_invalidthread);
 		}

+		// KK:
+		$query = $db->query("SELECT MAX(pid) as lastpostpid FROM ".TABLE_PREFIX."posts WHERE tid='$tid'") ;
+		$lastpost = $db->fetch_array($query);
+		// KK^
 		// Lets get the actual posts
 		$pfirst = true;
 		$query = $db->query("SELECT u.*, u.username AS userusername, p.*, f.*, i.path as iconpath, i.name as iconname, eu.username AS editusername FROM ".TABLE_PREFIX."posts p LEFT JOIN ".TABLE_PREFIX."users u ON (u.uid=p.uid) LEFT JOIN ".TABLE_PREFIX."userfields f ON (f.ufid=u.uid) LEFT JOIN ".TABLE_PREFIX."icons i ON (i.iid=p.icon) LEFT JOIN ".TABLE_PREFIX."users eu ON (eu.uid=p.edituid) WHERE $pids ORDER BY p.dateline");
@@ -429,6 +505,7 @@
 			{
 				$post['visible'] = 0;
 			}
+			$post['lastpostpid'] = $lastpost['lastpostpid'] ;
 			$posts .= makepostbit($post);
 			$post = "";
 			$pfirst = false;