Postfix/Altermime VS Google Apps

So I have finally got Postfix running the way I'd like. I'm using
Altermime to automatically attach a disclaimer to the footer of every
e-mail sent through it.

Altermime includes a plaintext and an html version of the disclaimer.

Whenever I send an e-mail through Postfix using a mail client (such as
Outlook, etc.) the disclaimer works perfectly. It includes the
plaintext version and if you view the message in html it includes the
html version.

However, when I set up my Google Apps for Domains system to use the
Postfix server as the "Outbound Gateway" it somehow causes the html
version of the disclaimer to be stripped from the message. So the
recipient gets the disclaimer in plaintext view, but if they view it
in html there is no disclaimer whatsoever.

I can't seem to figure out where why how this is happening?!@?!

Does anyone have any idea what might cause this?

Noticed a difference in the MIME headers, maybe this has something to
do with it?

When a send the message via desktop mail client it uses "Content-
Transfer-Encoding: quoted-printable" and this is the message that
works properly.

However, when relaying via Google Apps it is using "Content-Transfer-
Encoding: 7bit" with "Content-Disposition: inline" and this is the
message that doesn't display any of the disclaimer stuff in the text/
html version.