When I posted another post to these forums here, I got this message:

Notice: Undefined variable: attachlist in /html/plugins/forums/post.php on line 505

Warning: Cannot modify header information - headers already sent by (output started at /html/plugins/forums/post.php:505) in /html/includes/corefunctions.php on line 17

I just hit back; it still went up. (I also redacted the file path... habit.)

Thanks.  I'll look into it.