Continuity mistake: In episode 64, "For Whom The Bell Tolls. And Tolls. And Tolls", Tracy is shown seated at the table with a bowl of cereal - but in the shots immediately before and after, she's not there, nor is there any food at her place. (00:01:10)
Continuity mistake: Shirley tosses a loose measuring tape to Laurie, yet when Laurie catches it, it's tightly coiled. (00:06:00)
Princess and the Partridge - S3-E3
Continuity mistake: Keep an eye on the woman seated behind the Princess at the concert. In some shots she is wearing a necklace and seated beside a younger man; in others, she has no necklace and is seated beside an older man. (00:21:55)
Continuity mistake: Shirley, Reuben and Laurie are standing outside the bus having a conversation; however, the individual shots show Shirley and Laurie standing in the same place at the same time - in front of the G in 'Partridge' on the side of the bus. (00:11:25)
See Here, Private Partridge - S1-E4
Continuity mistake: When they are in the bus on the way to record an album, Shirley is wearing a pale blue turtleneck with a scarf. Suddenly she has a hat on and then they cut back to her again and she is wearing something navy blue with a white collar. Then she is wearing a pale blue turtleneck with a scarf again.
Continuity mistake: At the end Laurie is in the kitchen with her mom and Keith. She tells Keith the boyfriends of the girls who were chasing him are at the door. Her hair is down. Keith runs out of the door and she hollers after him. When they cut back her hair is in a ponytail.