Continuity mistake: At the end of Rose's prayer next to the feverish Charlie in the muddy boat, in the overhead shot that follows, the dirt on Katherine Hepburn's face is different. (01:21:55)
Continuity mistake: When Bogart responds "The Louisa, miss?!" to Rose's idea of torpedoing it, he is suddenly with his right fist in the air instead of clutching the other wrist. (00:25:05)
Revealing mistake: Charlie and Rose get married in front of a pretty, but obvious, matte painting of a lake (with unmoving waves). (01:41:30)