Set in comment by adding // in front of the following lines in /class/post.php

Remove /makepdf.php and the /fpdf/ directory.

Did you trace in your logs, who is requesting these pdf files?

Did you disable anonymous posting?

Set in comment by adding // in front of the following lines in /class/post.php
$thread_action['pdf']['image'] = newbb_displayImage($forumImage['pdf'], _MD_PDF);
$thread_action['pdf']['link'] = "makepdf.php?type=post&pageid=0&scale=0.66";
$thread_action['pdf']['name'] = _MD_PDF;

> i'm not find the line about pdf in /class/post.php(4.0 Alpha) ^^"

Remove /makepdf.php and the /fpdf/ directory.

> All done.

Did you trace in your logs, who is requesting these pdf files?

> all from guest user.

Did you disable anonymous posting?

> All done.