Mail 5.0 attachments

When receiving or sending mail with attachments in Mail 5.0 in Lion, the little "paperclip" symbol displays next to the message subject in the Inbox or Sent list, but within the message itself, the attachments don't show up, they neither display within the message body nor trigger the presence of a "Quick Look" or "Save" button at the top of the message as before.

Anybody experiencing this too? Anybody got any ideas for a solution? I've already tried deleting and then setting up my e-mail account again from scratch but it didn't work.

Any help gratefully appreciated!