A good answer is here at post #9:
http://forum.1cpublishing.eu/showthr...hlight=grumman
Basically ... it's just plain wrong ... I'd still like to see international copyright law clarified on this to ensure exemptions for the portrayal of history in art form, and to make the rulings retrospective to lift any restrictions created by past agreements. But I think that would require a political lobbying campaign in coordination with established historical organisations, and I don't personally have time to commit to that at the moment. If anyone else wants to run with that idea though, you're welcome.