Continuity mistake: When the Batwoman is fleeing at the very beginning of the movie, she is shot at by her pursuers from below. The shot, represented by a yellow streak, is then seen coming from above before it strikes the vehicle she is on.
Continuity mistake: Batman surprises Rocky in her apartment. The way he walks towards her after saying "Nice moves for a computer geek" is inconsistent (he came towards her from a corner, walks a good portion of the room, and is still almost in the same spot at the cut), plus, more noticeably, his shadow is perfectly circular at his feet while he is walking into the very angled light from the windows, complete with marked shadows from the window frame. (00:43:05)