Continuity mistake: Heather follows the sleeping pills (bread crumbs) into Dylan's room. She has the pills in her right hand and the kitchen knife in the left. She picks up two pills then reaches for the one on the pillow. She reaches for it with her index finger and thumb her hand closed but when they show the close up on her hand she picks it up with her middle finger and thumb with her hand open.
Continuity mistake: Heather goes to the hospital after she is cut by Freddy and the doctor bandages her up. The bandage goes to the middle of her arm then later when she falls into Freddy's world from her son's bed the bandage is around her wrist only and there are no scratches where the bandage should be.