Of course, Cuaron doesn’t have full run of the joint. (Chris) Columbus, who says he was “too physically exhausted” to direct the third movie, is serving as producer—and he makes no bones about the fact that he’s doing it to “protect” the Potter world he adores.
And THAT, FRiends, is a biggie. Double-checked with some movie gossip I know. Seems our little "artiste" is a loose cannon on the set with his "progressive" thoughts, and it interferes with the film.
I bet he can't break wind without it being a "political statement."