When the aunts are sitting at the table drinking coffee, Jenny is on the right and Sigrid is on the left. After Jenny asks, "Where are the children?" and gets up, she and Sigrid have switched places.
When Dagmar comes home from the hospital and is holding Uncle Elizabeth and takes the blanket from his face, he has no bandages on his face. When he jumps from her arms, several bandages are seen.
At the beginning, all the characters are standing around the kitchen table. Nels has his shirt sleeves rolled up, and with each cut, the sleeves alternate in the way they're rolled.
It's implied that Mr. Hyde read "A Tale of Two Cities" to the family in one night. Reading that book aloud at a pace to be understood would take at least 10 hours.
Mama is talking with Miss Moorhead about her recipe. When she leans in to whisper, Irene Dunne loses her Norwegian accent.
In the shots of the uncle's trip to San Francisco, as the ferry is pulling into the dock, the Oakland Bay Bridge is seen in the background. This bridge was not built until 1933, yet this movie is set circa 1910.
Mama tells Katrin she came to America because all the family was there. Katrin asks if she liked American as soon as she got here. Mama said she loved it as soon as she stepped off the ferry in San Francisco. Emigrating from Norway, she would have first arrived in America on the east coast of Canada or the U.S.
When Dagmar asks if they can get a pony, she is asked in return, what are you going to do when the pony grows up to be a horse. A pony is not a baby horse; it will remain small its entire life. A baby horse is a foal; it also can be called a colt or a filly.