There are a couple of ways to do this. I prefer the Xenon way, through a file edit, but it can also be done by a template edit. The file edit is as follows:
In private.php
Find:
PHP Code:
// allow quotes to remain with an optional request variable
// this will fix a problem with forwarded PMs and replying to them
if ($_REQUEST['stripquote'])
REPLACE it with:
PHP Code:
// allow quotes to remain with an optional request variable
// this will fix a problem with forwarded PMs and replying to them
if (true OR $_REQUEST['stripquote'])