When Pollyanna is trying on hats at the mercantile, she tries on a straw hat with blue flowers but her aunt shakes her head no and Pollyanna takes it off, very disappointed. The next day, Pollyanna is wearing the same straw hat at the church service.
When Mildred and Nancy go to check on Mrs. Snow and Pollyanna, the prisms are still hanging on Mrs. Snow's lamp. After the cut, they are all off the lamp and hanging in the window.
Mrs. Lagerlof and Mr. Tarbell can be seen dancing during the beginning of the bazaar scene, before either of them have actually arrived at the bazaar.
At the beginning of the movie when Kevin Corcoran is playing with the large hoop, we see two girls pushing baby carriages side by side. In the next shot we see them standing very far apart so the hoop can go between them.
When Pollyanna is talking to Reverend Ford about her father (while Ford is practicing his sermon) she starts to bite her nails. Between camera shots it jumps from her biting her pinkie to her thumb.
Los Angeles smog visible in the background in the scene in the field with Reverend Ford. The story locale is turn of the century Vermont.
The sun has to shine right through a prism to produce the spectrum on the wall. In none of the scenes where the prism is important is the sun's light visible.
During the bazaar, Polyanna and the other girls dress as the American Stars and Stripes with 13 stars on it. The flag has always had one star for each state in the union. Utah was the 45th state to join the union in 1896, and the film is set at the turn of the twentieth century, so the flag should have had many more stars on it.
Mid-20th-century smog is visible in the background in the field with Reverend Ford.
After a orphanage meeting at the Harrington house one mentions, "This is not a big town like Cleveland," suggesting that the setting is Ohio. Ohio doesn't have the hills or mountains seen in the movie.
Aunt Polly's entire staff knows that Pollyanna can't come to the bazaar, motivating the cook to bake dozens of cakes to sell, yet when she sneaks out the window and shows up, they all tell her to hurry up and put on her costume so she can be part of the flag, as if they were expecting her to show up despite being forbidden by her Aunt.
When Nancy and Pollyanna are delivering the charity baskets and they are at Mr. Neely's house, Nancy rushes Pollyanna saying, "Come on honey we still have three more to go." After they leave there they make another delivery, and after leaving that house Nancy has four jars in her basket and Pollyanna has one in hers. Shouldn't they have had two left if they had three to go at Mr. Neely's house?
In Mrs Snow's bedroom there is a serpentine-fronted chest of drawers prominently displayed in several scenes. One of the drawers in the chest has been slid into place upside-down (this is easily discernible due to the shape of the handles and the position of the key-hole).
During the first dinner that aunt Polly and Pollyanna have together, Aunt Polly uses her butter knife to cut her roll. This is totally against table etiquette for that time in history.
While shopping, Pollyanna is scolded for coming out of the changing are in her underwear. In the next scene when she is trying on hats, she is sat out in the open in her underwear and no one is batting an eyelid.
Before Aunt Polly takes her first bite of her dinner, she makes a cut with her knife and fork, but she is cutting the air because she doesn't touch any of the food with her utensils.