SaveToFile bug?

I discovered that when a message is saved tofile the following lines get
added:

--=_NextPart_2altrfkindysadvnqw3nerasdf
Content-Type: multipart/alternative;
boundary="----=_NextPart_001_000E_01C1B49E.F9DC95A0"
Content-Transfer-Encoding: quoted-printable

It turns out that these lines tend to change the messageParts.Count from 6
(html mail + 3 attachments) to 2. Can anyone verify if these look right, or
why they would change the .Count?

Thanks,

Tom Schaefer