Factual error: After its trip over the ocean on which it got soaked with moisture the piano is amazingly well in tune, only later, at Baines' place, it sounds a little bit off. (00:07:30 - 00:32:20)
Continuity mistake: The stains on Stewart's top hat have a different pattern when he reaches the shore where Ada and Flora are waiting. (00:11:40)
Continuity mistake: When Baines takes Ada and Flora to the shore, the girl builds a large and beautifully decorated seashell seahorse on the sand. To do this, she had to work from all around, but on one side the sand is pristine (and the sea is too far to have straightened it out). (00:23:25)
Continuity mistake: When Baines has his first 'piano lesson' Flora asks to be allowed in. Ada declines, and when she goes back in the house her playing starts immediately when she closes the door, way before she could have walked to the piano and sat down. (00:40:40)
Continuity mistake: The rope that pulls Ada down is much longer than the one that ties her shoe to the piano when it's sitting on the ground. (00:48:10)
Continuity mistake: During one of the piano lessons, Baines tries to force Ada to lie on the bed next to him. When she tries to leave, he holds her back, pulls her blouse down about the shoulders, and it tears in the back. When she gets up later, the blouse is whole again. (00:52:05)
Continuity mistake: When Stewart has a heated argument with a group of Maoris over some land deal, a guy with two feathers in his hair appears in front of him between shots. (01:06:10)
Other mistake: When Ada and Baines make love and Stewart peeps through a crack in the wall he puts his ear to the wood, not his eye. (01:13:55)
Revealing mistake: When Ada and Baines leave the island the Maoris pull the heavy canoe with the piano on top across the beach into the water. From the tracks in the sand you can tell that it runs on wheels. (01:44:35)
Continuity mistake: Before the piano gets thrown overboard Ada holds her hand into the water. In close up the water is perfectly still while in all wider shots it's quite choppy. (01:46:30)
Other mistake: When Baines takes Ada to bed, and she removes her clothes, her skin is smooth without blemishes. This would not be the case in real life when wearing corsets etc. They leave indentations on the skin.
Revealing mistake: When Ada is playing in her sleep, you can tell in the first shot of her hands playing that it is not Holly Hunter's hands. The hands are larger and masculine, obviously a male's hands.
Continuity mistake: When Stewart discovers Ada tried to send a message to Baines and bursts into the house, the view from inside the house shows a clear day outside. When he drags her out, it's now raining heavily.
Suggested correction: It starts to rain when he is coming back home, you can see the water and hear it. And it was not a clear day, it was morning and there was no sign of sun because the sky was grey.
