I saw the movie and thoroughly enjoyed it - whether or not it had shortcomings with respect to historical accuracy or not. I honestly don't see it winning any Oscars unfortunately, unless for maybe Nicole who's part I thought was terrifically played. I could have cheerfully strangled her myself early on in the film - but in a nice sort of way if you know what I mean
I certainly wouldn't be so bold as get on my soapbox and start spouting about which bits were and which bits weren't historically accurate, but Mike, if the Japs landing on Mission Island was the only bit you picked up on as not being quite right, you might like to read Germaine Greer's comments from earlier on in the weeks' press. She had plenty to say, particularly about the treatment of Aborigines at this time.
I'm no great fan of hers particularly, but she seemed to know what she was on about in this regard. It made interesting reading anyway.
Just my 2c