When Sara uses the chalk to draw a circle around herself in the attic room, it is an irregular rectangle shape and the candlestick is outside the circle. When we see Sarah through the window, the circle is a near-perfect shape and it is wide enough that the candlestick fits well within the circle.
When Sara's shawl is blown away, she goes to retrieve it and stops when she sees Ram Dass. When Ram Dass walks away, Sara turns in the opposite direction and doesn't pick up the shawl or the basket, but in the next shot, she has both.
When Sara is explaining to Lottie about angels, she is demonstrating how the angels ride the clouds like magic carpets and is using her right hand. However, in the next shot, when she tells Lottie that the angels hover over you and see that you are all right, her left arm is raised.
When Miss Minchin introduces Sara to the rest of the class, she then starts saying, "Now, there are certain rules...", and we can see Monsieur Dufarge taking a cup and saucer from behind his desk twice (both times at different angles).
When Sara and her father are traveling from India to New York, a map is shown. This map is inaccurate considering the fact that the subtitle stated the year was 1914. The map that they showed was a post-WWI map instead of a pre-WWI map. There were many countries that didn't exist before then such as Turkey, Czechoslovakia, and more. The year in this map was supposed to be before the war ended but it clearly was not. They showed a map where Austria-Hungary was broken up into many different countries; however that didn't happen until after WWI. There were also many other chronological errors in the map shown.
When the girls are trying to steal back Sara's locket, a box on the desk opens and closes between shots. However, since the girls are searching the office, it is reasonable to assume that one of the girls opened it to search the box for the locket, then closed it while the camera was focused elsewhere.
Across the foyer from the sitting room in the school, we can see a music room that has two windows, but from the outside there are no windows. Also, it's impossible for there to be a room to the right of the foyer because on the outside there is not enough room.