Corrected entry: When Jack Wyatt is speaking on stage, there is a large video screen behind him, to allow those far from the stage to see the speaker clearly. The movement by Jack on stage is not the same as the movement on the screen. When Jack is moving quickly the image on the screen is not (and vice-versa).
Corrected entry: In the scene where Aunt Clara prepares for the hex, Nina prances around and blurts out Nicole (Nicole Kidman) instead of Isabel, her character's name.
Correction: This is actually a myth. Nina says, "I believe in unicorns." not "I believe in you, Nicole". Playing the audio in slow motion lets you hear the word in question.
Correction: On a live video board, the projected image is always lagging just a little bit behind the real life action, so in this case, it appears there is movement when there is none, and vice versa.