Audio problem: At the end of the scene when Anna's wedding ring is thrown in the stream, The Kralahome, Prime Minister, says to King Mongkut "I believe there has been enough insult caused by this woman who believes herself to be the equal of a man." When King Mongkut replies, "Not the equal of a man, the equal of a King," Kralahome is very visibly mouthing his line.
Continuity mistake: When Anna and her son were riding the coach, Louis' hand is visible. He was holding on to something. But when the shot changes angle, his hand is no longer there. (00:04:10)