When they are playing in the street with the orphans from the children's home, Pippi says "Come on kids, it's Pippi Longstocking day!" When the view changes we see her say it again but there is no sound.
After Pippi tries to sell the sewing machine and rushes around to the other door, you can see that it is green. When she goes to open it and pulls it open, the camera view is from the inside when it do so, but she is pushing it and it is not green but wooden.
Seems like this could be one, but might not be...
During the scrubbing scene as the song is playing, the lyrics mention 'Monday morning'.
Soon after the children leave and the guy comes to inspect the house, Pippi tells him it's Friday.
Pippi walks down the wall out of the orphanage, and must jump out of her shoes. It doesn't show her putting them back on, but she is seen with them on in the next scene, throwing the message in a bottle into the sea. In the following scene, when the orphanage is on fire, she suddenly has no shoes on and must put them on to climb again.
When Pippi, Tommy and Anika are riding the horse/motorcycle through town, palm trees are quite visible throughout the town square. Yet, in the Christmas scene, it is clearly snowing and people are bundled up in the cold.