Other mistake: When Jane is setting up for his escape from prison, he captures a wild mouse. Then he presumably holds her in his hand for the whole time. I've handled mice, and when they're scared, they bite hard enough to take chunks out. There's no way a wild mouse would stay in human's fist that long without drawing blood.
Deliberate mistake: When the investigators are in the basement wine cellar, they turn on their flashlights to illuminate the pitch black area as they walk around. However there is a light source moving with the camera shining on them as they are casting a shadow behind them.