When Vladimir sits in drunken slumber on the Czar's throne, in the medium shots his head is leaning to his right, but in the long shot as Ivan approaches, it leans to his left.
Just past the 58-minute mark during the color dancing sequence, a dancer accidentally pushes the wig off the head of Vladi Pavel Kadochnikov), as he lays on the floor in supposedly a drunken state.
In the movie young Ivan IV is making a contract with the Livonian Brothers of the Sword. However it didn't exist since the 7th June 1238, almost 300 years before Ivan was born.
The conflict between the German Hanse union and Livonia happened during the 1550s, when Czar Ivan IV was in his 20s. In the movie however Ivan was portrayed as a young boy of 8 years.