corrupt messages when using Postfix with milter

[Nerijus Baliunas]

Hello,

I am using milter-greylist 3.0 with postfix 2.3.3. main.cf:

milter_default_action = accept
milter_connect_macros = j {client_addr}
milter_protocol = 3
smtpd_milters = unix:/var/milter-greylist/milter-greylist.sock

But there is one problem. New line and "              0" are added at the end
of every message, and a number (pid?) is added after all the headers,
but before MailScanner added ones:

Message-Id: <20061127145914.674468019A at mail.xxx.lt>
           3753
X-xxx-MailScanner-Information: Please contact the ISP for more information

I asked in postfix list, Wietse said:
Are you by any chance using a content filter? Mailscanner will
surely screw up the queue file if Miltering is enabled.

And right, if I disable MailScanner, messages are OK.

Regards,
Nerijus