The Not-So-Rose-Colored Glasses - S3-E13
Continuity mistake: In the middle of the episode, a boxy gold station wagon is pulling into the Brady driveway, which immediately cuts to a shot of a rounder body style, gold station wagon pulling up to the carport.
Visible crew/equipment: When Alice is recuperating in bed, above her on the wall one can see the shadow of the boom mike. (00:14:05)
Continuity mistake: At home, before leaving for the Grand Canyon, the trailer was much taller than the car, and looked more like a motor home. After that, it becomes a different vehicle more like a trailer, about the same height as the car. When the prosecutor steals the car, it's the tall version, and when they arrive at the Grand Canyon to look at the view, there's nothing attached to the car bumper. When they leave the Grand Canyon it's the shorter version, back to being a trailer.
The Dropout - S2-E1
Other mistake: When Greg is in the kitchen getting ready to leave for the baseball game, there is a number 53 on the back of his jersey. In the following scene at the baseball park, there is another man with his back turned throwing practice balls, who also has the number 53 on the back of his jersey. It is clear that it is not the same person.
Lost Locket, Found Locket - S1-E25
Continuity mistake: When they are getting ready for the reenactment of the night when Jan lost her locket, Greg is about to eat an apple when the boys walk into their room. When Greg sits down, his apple is mostly finished.
The Power of the Press - S3-E19
Continuity mistake: The book in Jan's arms keeps moving; first the front is facing outward, then the back, then the front again. (00:13:40)
Other mistake: Near the end when Greg goes into the living room to call the police, he picks up the phone receiver and says into it "Jan, hang up the phone, I have to make an important call." But Jan was in the TV room, watching the TV, sitting next to Marcia.
Suggested correction: The phone is sitting next to her on the couch and you can see she's on the phone.
Factual error: About 1/3 through the show, Greg has to talk to Marcia and asks Peter to leave. On the way out Peter stops to start recording on the tape recorder. He only pushes the play button. He would have had to push the red record and play button to record their conversation.
Visible crew/equipment: As Mike gets up from the table after lecturing the girls, the boom mike's shadow becomes visible on his back. (00:15:00)
You Can't Win 'Em All - S4-E22
Continuity mistake: The dress in Cindy's arms turns around from one shot to the next; first the back is facing outward, then the front is. (00:14:15)
The Power of the Press - S3-E19
Continuity mistake: The book Peter's classmate is holding rotates between shots. (00:10:00)
Audio problem: Many times throughout this episode, the actors' voices echo, especially when Mike yells out to Peter (and vice versa) from different rooms.
The Great Earring Caper - S4-E20
Visible crew/equipment: The stage lights are reflected in Peter's magnifying glass. (00:04:00)
The Big Bet - S3-E18
Revealing mistake: When Bobby closes the sliding door behind him, the curtains swing outward and through where glass should be, revealing it to be an empty frame. (00:01:15)
Continuity mistake: When Greg runs into the girls' bedroom to rescue Bobby from the window ledge, there's a black stuffed animal sitting in the middle of the bed nearest the door. After Greg pulls Bobby into the room, the stuffed animal is at the head of the bed. (00:03:45)
Continuity mistake: The football diagram that Greg draws on the chalkboard changes from shot to shot. (00:07:00)
Continuity mistake: Jennifer writes her phone number on Greg's right hand with the first number starting at his thumb, but when Greg looks at his hand to read the phone number, the phone number was written with the first number near his fingers and the last number written by his thumb. (00:02:50)
Goodbye, Alice, Hello - S4-E10
Continuity mistake: Greg is wearing dark dress shoes when he comes in to the yard playing football with Peter. When they enter the kitchen, Greg is wearing white sneakers, and when Greg enters the living room, he is wearing the dark dress shoes again. (00:01:15)

Snow White and the Seven Bradys - S5-E3
Continuity mistake: During the play, Mike's "Prince Charming" hat disappears and then reappears when he leans over to kiss Carol. (00:22:15)