Factual error: In the scene where Mei is bathing in that small pool, you can see on her arm a the scar from her vaccination. As you might expect, they didn't have these vaccinations in the 1800s.
House of Flying Daggers (2004)
1 factual error - chronological order
Directed by: Yimou Zhang
Starring: Ziyi Zhang, Andy Lau, Takeshi Kaneshiro, Dandan Song
Continuity mistake: In the bamboo forest fight scene, Jin and Mei are pinned down by the bamboo spears and they are surrounded by a field of bamboo stakes. But when all the soldiers that were sitting in the bamboo are shot down by the Flying Dagger members, the stakes suddenly all disappear, and then reappear after all the soldiers have landed.
Yee: If you had known what the truth of the matter really was, do you think you still would have come here with her?
Trivia: The mysterious new leader of the flying daggers never actually appears because that role was intended for actress/ singer Anita Mui, who resigned the (impending) filming due to ill health two weeks before dying of cancer. Out of respect Zhang Yimou didn't replace her with another actress and the film is dedicated to her memory.