Yuck, those starfield replacements in the Avenger scene are very screwed up. I noticed them before and they bothered me considerably, because the movies are supposed to have big and bright stars where in the '04 versions they are usually small and dim. And it isn't even the same element composited in at all; there are far fewer stars and it just looks ridiculous. (Not to mention that nasty aqua haze over everything is even more obvious in a direct comparison, but that's a whole other thing.)