Irregular Around the Margins - S5-E5
Continuity mistake: When the car that Tony and Ade are driving flips over, the back lights on the car die out. But in the last shot of the car the back lights are back on.
Continuity mistake: When Meadow is driving Janice's car, Janice's right arm moves around on the window sill from shot to shot, and the cigarette Janice is smoking gets longer instead of shorter as she smokes it.
Continuity mistake: Tony makes a toast at the dinner table in front of Carmella and Anthony. Watch Tony's wine glass during the toast, the amount of wine in the glass changes dramatically from shot to shot. (00:21:45)
Continuity mistake: When Silvio Dante is talking to Richie Aprile, from a back shot Silvio rests his head to the back but in the next shot it's straight and down.
Continuity mistake: When Hesh and Massive Genius are talking on the porch, Hesh is leaning forward and picks up a glass of ice tea. A second later, in the next shot he is sitting back in his chair, and is no longer holding the glass.
Continuity mistake: The size of the hole made by Tony Blundetto on the wall keeps increasing and decreasing all the time.
Continuity mistake: When Junior comes downstairs from shaving and enters the kitchen, his face and left ear have some smears of shaving cream. Junior walks into the den in the scene that immediately follows, and the smears of shaving cream have increased under his nose and on his left ear. (00:13:40)
Continuity mistake: When AJ is telling his parents about the party, his sleeves go from being rolled up above his elbows, to being rolled right down and back again between shots.
Continuity mistake: In all of the episodes where Carmela hosts her film club, the theater seats in the Sopranos' screening room are gold, attached with wide trays for snacks, beverages, etc. But in this episode, when Tony and A.J. move the seats outside, they are maroon, without the wide trays.
Continuity mistake: While standing outside the horse's stall, Ralphie's arms go from being at his sides, to folded across his chest throughout the whole scene.
Continuity mistake: Livia's hair style keeps changing all the time while having her last talk with Tony. In this scene the Livia character has been superimposed from pre-existing footage as the actress Nancy Marchand had passed away.
Continuity mistake: When Tony sits by the pool, the position of the towel on the chair changes through shots.
The Telltale Moozadell - S3-E9
Continuity mistake: During the scene where Rocco gets water thrown at his face, the position of his hands differs between the close-up and the wide angle.

Continuity mistake: During the show's opening credits for the entire run of the series, when Tony drives up to the NJ Turnpike toll gate, the lane 7 machine spits out a toll ticket, and Tony reaches for it. It then cuts to a close-up as Tony grabs hold of the toll ticket, but this ticket machine is now different; note all the stickers. The close-up was shot at another lane's ticket machine.

Continuity mistake: At dinner, when Meadow gets upset, she leaves the table and heads upstairs, so Carmela leaves the table and follows her daughter. Then, when Livia gets insulted, she tells Junior to take her home, and she too leaves the table. The problem occurs when Tony tells Junior, "You mangia, Uncle Jun', she'll come back," and in the next shot facing Junior, the reflection on the door shows Carmela and Livia are still seated at the table.

Continuity mistake: When Janice goes to Livia's mailbox and retrieves the envelope with her disability check, the words "TOTAL DISABILITY" only appear on the check in the close-up, but not in the previous shot. Additionally, the silver screen door is gone between the first wide shot when Janice pulls the mail out of the mailbox, and the next close-up as Janice looks through the mail in her hands (she did not open the screen door between shots).
I Dream of Jeannie Cusamano - S1-E13
Continuity mistake: Tony, Carmela, and the kids end up at Nuovo Vesuvio during the storm. When Artie serves the dinner, AJ picks up a piece of pasta with his fingers, and in the shot facing Tony as he reaches across the table to AJ, he's holding his dinner knife, but in the next shot facing AJ, it's a fork in Tony's outstretched hand, not the knife.

Continuity mistake: When Tony shows up at Livia's house with a bouquet of flowers, in the exterior shot note the transparency of the screen door's glass, the front door silver-color knob with its back plate, as well as the deadbolt cylinder. As Tony enters the doorway in the next interior shot, we cannot see out through the screen door's glass, the door knob is gold-color, and both the knob's back plate and the deadbolt cylinder have vanished.

Continuity mistake: At the hospital, when Agent Harris presents his business card in case Tony changes his mind, Harris holds his card at its bottom so it's up over his hand, but in the next shot facing Tony, Harris holds the card at its top so it's below his hand, and it continues this way in the next shot as Carmela takes it from his hand.
Knight in White Satin Armor - S2-E12
Continuity mistake: When Tony says goodbye to Janice by the bus. A black fella in a hat has already walked past them both. But as the camera angle changes. The same fella walks past them again from 5 yards further back. (00:54:14)