Exo: I am having the exact same problem. On my desktop (Mail app on a Mac) it shows a MS Word document that is attached to a particular message. When I look on my N900 it says nothing about an attachment, however the message details reveals a size that means that the attachment is in fact there.

Is there some MIME mapping not happening? Is this a bug? This was happening before PR1.0.1 and PR1.1.