That's not confined to the Vogue, they're actually characters that there isn't a standard encoding for - mostly components of characters and such. We've been waiting for the publisher to supply us with the latest edition of that dictionary (they've had some staff issues recently and it's taking forever), but once they do we're planning to hire someone to go through and replace all of those ?s with custom character codes that will render correctly. (this may not ever be supported on Windows Mobile, though, unfortunately)