Inglourious Basterds - Postmodern Elements

In inglourious basterds there are verious postmodern elements which is typical of quentin tarantino.
Firstly, the music. in a war film you would expect to find old fashioned music from the era it is set or if not modern music conducted to sound old. however, in i.b, tarantino uses modern music. for example, in one scene he plays a david bowey song. although the song works for the scene of shosanna doing her hair and makeup, yet clearlly wasnt released in that time era.
also, the way tarantino uses music from spaghetti westerns is strange. this is odd as you wouldnt expect cowboy like music in a war film because it is completely mixing two genres. yet in the woods scene it does work.
Furthermore, the way the film starts with 'once upon a time' and is split into chapters is post modern. in a war film you would maybe expect it to be split up into dates/years, yet not chapters with that opening line. this implies it is a fairy tale and all made up. which in the most it is, yet the idea is that you believe this happened during WW2.
another element is the way in the first scene where the colonel goes to the house where the man is hiding the jews under the floorboads, you can notice that the backdrops are actually painted. this is strange as you would expect them to just film in a place where the backdrops work, rather than painting them yourself.
To continue, tarantino also gets the basterds to 'scalp' the people they kill. this would not of happened in WW2, so mixing two different time periods together and entwining different ways of killing makes the film different and gets the audience to think about what really happened back in the war.
In the scene where we see soshonna walking around her cinema, it turns into a birds eye view so you can see that it is all just a set and not a real building. this is postmodern as you would NEVER expect a film director to allow the audience to recognise that it is all a set as it gets rid of the authenticity of the film and almost spoils it for the audience as they then are placed back into reality of knowing the film is just a film. however, when you are watching i.b you dont really pay much attention to it, and it almost skips your mind of what youve just witnessed. its only a little while after when i really noticed it and couldnt believe what tarantino had done on such a huge film.
Another scene where postmodernism is used is where there is a split screen of a man trying to get a nitrate film onto a bus. this is strange as this is a modern thing to do (to split screen) and the whole film is based on old fashioned war.