[Xenon]

you can add the same piece of code into editpost.php as well, which will prevent that as well.

if you chang it a little bit in editpost.php you get exactly, what you want:

PHP Code:

if (in_array($foruminfo['forumid'], array(x,y,z)) AND $threadinfo['firstpostid'] != $postinfo['postid']) 
{ 
$forumperms = $forumperms & ~CANPOSTATTACHMENT; 
}