Thank you for your question above. We tested the solution with an English 6.5.3 (18/11/2004) client this morning and it included all attachments.
Do you see this problem with all messages you try to print? Are you trying to print messages from a shared folder, or somewhere other than your mailbox?
If it happens with all messages, perhaps you could send a message to yourself containing attachments and try to print it. If it fails, please forward the same message (as an attachment) to email@example.com and we’ll see if we can duplicate the problem with the same message.