Continuity: The telegram that Ted Hanover receives from Jim Hardy on Christmas Eve is dated December 25th.
Continuity: The calendars shown for the last part of the film are from 1942, except for November, which is from 1941. The progression of calendars goes December 1941, February 1942, April 1942, July 1942, November 1941, and December 1942. This November calendar portrays the second-to-last vs. fourth Thursday Thanksgiving day confusion, started in 1939 by presidential proclamation, and cleared up by congressional legislation in 1941 for the 1942 calendar.
Audio/visual unsynchronized: When Jim Hardy plays the bells on the Christmas tree at Holiday Inn, he hits the two bells twice, but in both cases, gets different tones the second time.
Continuity: When Lila gives Linda a lift to Holiday Inn, Linda gets in the car, sits down, and starts to close the door. In the next shot, Linda hops into the car again.
Continuity: Jim leaves his jacket in Ted's room before the first wedding. Although he doesn't pick it up, he has it when he goes into the studio.
Continuity: Linda loses her hat in the pond when she is with Gus. Although she isn't seen finding the hat, she has it on when she and Lila are driving.
Continuity: When Jim enters Ted's Hollywood dressing room, he has his pipe on the left side of this mouth. The next shot shows it on the right side, although he has had neither time enough, or his hands free to move it. When Jim and Linda first meet at the club, the orchestra is playing is an instrumental rendition of "Be Careful, its My Heart." Later, on Valentine's Day, Jim says the song is brand new, and he wrote it just for her.