During the scene in the kitchen when Lizzie is talking about the pool party and discovers it's her grandmothers birthday, throughout the whole scene, her necklace continually disappears and reappears between shots.
When Lizzie is in her room sorting out clothes, her Mum comes in and informs her that she can now go to the party. During the scene that follows with Lizzie and her Mum talking on the bed, Lizzie's necklace continues to hop in and out of her tee-shirt between shots.
During the pool party discussion in the kitchen, Mrs. McGuire places the salt shaker down next to the pepper shaker. Yet in the next shot she is placing the shaker down once again, and the other shaker has now vanished.
When Kate is walking down the hallway towards Miranda and Lizzie, her bag strap lies perfectly diagonal against her chest. Yet in the next shot it hangs more vertically, at her side, then back to diagonally.
When Lizzie is at her locker, she is looking at the wishbead necklace that she and Miranda had made. The necklace is hanging from a peg inside the locker. She then spots Miranda with Kate and then closes the locker door, only now the necklace is missing from the peg.
When Lizzie goes into the living room while her Mum is on the phone, she takes the remote control from Matt. We can then hear Matt shouting tales at Mrs. McGuire, but if you watch him his mouth isn't moving at all.
During the scene in the kitchen when the family is discussing Lizzie going to the pool party, in a close up of Mrs. McGuire there are lighting screens reflected in her glasses.