Continuity mistake: At the end of the movie when Evan and God are talking under a tree in a field, God is holding a wooden staff. As the camera cuts back and forth between Evan and God, God's hand changes position from holding the top of the staff like a cane to holding the staff further down like a walking stick.
Continuity mistake: In the first part of the movie, Evan is driving his new Humvee and several birds fly over and poop on the windshield. Of course he turns on the wipers and it streaks all over the place. When he is done, there are still obvious and large streaks on the drivers side yet during the next 10 scenes, the streaks appear and dis-appear several times.Most obvious when he parks and walks past the front of the vehicle.