Other mistake: In the first scene, Liz and Martin are driven in a taxi from the airport. The driver is on his mobile phone. The subtitles say that he is speaking German, however in fact he is speaking Turkish.
Other mistake: Between the freeway battle scene and the convenience store scene; there's a transition shot where you can see the characters walking through a bombed out LA with the alien aircraft flying above. If you pay attention to them, instead of following the camera, at the end of the shot you will see them all stop moving mid-stride while everything else in the shot continues to move.
Other mistake: As Johnny looks down on the wrecked car after defeating the devil, we see a blank brake disk without a wheel on. I guess it would theoretically be possible for all five lug nuts to rip clean off during an accident and leave the brake disk bare and exposed. But then the threads in the disc would still contain the shorn-off remnants of the lug nuts, instead of being empty. (01:23:00)
Other mistake: A colleague approaches Ben, picks up a newspaper, and tries to pronounce Volkskrant. Ben gives the correct pronunciation, tells him it's a Dutch newspaper. However, the top of the newspaper is visible and says Trouw, a different Dutch newspaper. (00:40:00 - 00:43:00)
Other mistake: Danny meets the union muscle in the machine shop at midnight, but it's broad daylight as the sun is coming through the windows. (00:13:40)
Other mistake: Just as the preacher finishes stitching up Jake's wound, a shot rings out from the street, and everyone goes outside to find Percy Dollarhyde drunk and shooting up the town. Percy is right-handed but holsters his 6-shooter revolver on the left, and this appears to be his only sidearm. Even if he did carry another 6-shooter, that wouldn't explain how he fires 13 shots in this scene without reloading.
Other mistake: The gasoline at the climax of the movie catches fire, which is absolutely fine...but the fire spreads with the same intensity and speed across the money pile which was not touched by the gas. And it does it with a pattern, too. But the gas never got there. (01:21:45)