During the spear fight on the staircase, both combatants instantaneously move about three feet to the left, from in front of a column to in front of the staircase.
When Mark Antony is shot in upper arm with an arrow, Raymond Burr barely reacts, doesn't even flinch.
Both Cleopatra and Cytheris can be seen wearing modern bras.
Shadows of the camera crew can be seen in the close shots of Serapian and Arsinoe fleeing in the chariot.