Continuity mistake: At the end when Meg steps out of the water, her pants are wet. However, when she enters the bedroom and finds the Phantom's mask, her pants are perfectly dry. (02:10:35)
Factual error: In the scene where the fireflies light the fireworks there is one problem: The chemical that creates light wouldn't ignite the wick on a firework.
Factual error: When they show the Nelson Eddy song 'I Love You', the set/movie shown is Rose-Marie. But that number is from Rosalie not Rose-Marie. Two totally different movies - one set in West Point not with the Canadian Mounties. There are no Cole Porter songs in Rose-Marie, likewise there are no Mounties in Rosalie. Rose-Marie's music was by Harbach / Hammerstein II / Friml / Stothart. (01:09:25)
Factual error: Before 1949, when the part of the film set in Hollywood takes place, the famous sign on the mountain read "Hollywoodland", not "Hollywood". The sign had been allowed to deteriorate and during that year, the Hollywood Chamber of Commerce offered to remove the last four letters and repair the rest.
Continuity mistake: In the scene where they go to the party and dance with the sticks, there is an overhead view of the whole party. Johnny and Lalita are dancing in the middle, and just before the camera cuts to another view, Lalita drops one of her sticks, but has it in following shots.
Plot hole: In the scene where the Sheriff stops the cows' brawl, he gives them to the Chinese man. The Sheriff knows what Pearl's animals look like, so why didn't he recognize the cows as Pearl's?
Continuity mistake: After Bobby Darin loses the Academy Award for supporting actor, he and Sandra Dee argue and threaten to leave one another. Sandra Dee jumps into her pink '63 Cadillac Coupe Deville and roars away as Bobby Darin jumps into his red '61 Cadillac Convertible and futilely tries to start it. The car's battery fails, and we see the four headlights flicker and go dark. Enraged, Bobby Darin jumps out of the convertible and begins smashing the car with a golf club. When he starts smashing out the headlights, all four lights are now glowing brightly.