Invalid 'Return-Path:' header being inserted by MailScanner?

[Durval Menezes]

Hello folks,

I've been experimenting with MailScanner's quarantine for spam messages
('Spam Actions = store') and found that it inserts the following header
as the first line of every quarantined email file:

	Return-Path: <<81>g>

(The <81> is actually a binary 0x81 character).

Tried updating from MailScanner 4.48.4 to the latest version (4.54.6),
but the above problem persists; searched both Google and this mailing
list's archive to no avail.

Have anyone here seen anything like it?

Thanks in advance.

Best Regards,
-- 
   Durval Menezes (durval AT tmp DOT com DOT br, http://www.tmp.com.br/)