It seems to me, that webos has problems with multipart mime messages. I'm subscribed to multiple mailman mailing lists and those add a "--- List Name" to the end of all emails. If the message contains attachments, this leads to multipart mime messages that have a text part, an binary part, and then another text part.

And the email app only shows the last text and the attachment. this sucks cause it drops the text and only gives me the footer and the attachment, which most of the time is a signature that the pre can't use either.