Forman, who was considered a traitor for becoming an American citizen and not returning to the Soviet-controlled area, had previously had one of his movies banned in the country (then called the Czech Socialist Republic). According to Twyla Tharp, in order to shoot in red territory, Forman had to make certain concessions. "Milos had to sign an agreement that he would go to his hotel every night for the year that he was there and that his driver would be his best friend from the old days," Tharp told The Hollywood Reporter. "And everybody knew what would happen to his best friend if something untoward politically happened around Milos, because Milos was a sort of local hero and he was dangerous to the authorities."
According to a famously censored document in which a teacher near Vienna, Anton Herzog, recorded firsthand accounts of von Walsegg's court, the Count often rewrote these commissioned quartets and other scores in his own hand and didn't give credit to the original composers. His staff musicians often laughed this off because it seemed to amuse the Count, and because the Count was also an amateur musician in his own right. Mozart's "Requiem Mass in D minor," the document alleges, was one such piece. And Mozart really did die later that year, in December, before completing the full mass. Salieri didn't help him complete it though; Austrian composer and possible Mozart student Franz Süssmayr took that on.