[mokujin]

Try this: Go to admincp, add new plugin showthread_getinfo

Then paste this code:

PHP Code:

// check for visible / deleted thread
if ((!$thread['visible'] AND !can_moderate($thread['forumid'], 'canmoderateposts'))
    OR ($thread['isdeleted'] AND !can_moderate($thread['forumid'])))
{
    exec_header_redirect('vbbnotfound.php'); 
} 


Hope it help you.