Continuity mistake: When Harry and Cedric are transported to the cemetery, the Triwizard cup lands on the grassy slope, well beyond the Riddle monument, with its luminescent top facing away from the cauldron area. During Priori Incantatem, three shots after Voldemort exclaims, "He's mine!" the cup lies on the corner of the Riddle monument's stone base and it faces the opposite way. The cup is back up on the grassy area in the following shots.
Continuity mistake: After Wormtail performs the Avada Kedavra curse and then raises the "bone of the father," he places Voldemort's wand inside the left side of his coat, before he slices off his right hand. When Voldemort says, "My wand Wormtail," Wormtail retrieves the wand from the right side of his coat.