Goofs

Before Harry lands on the ground from the moving van, his glasses are already on the road and broken.

Harry climbs onto the roof of a truck and sees two cars overturned and on fire amidst the chaos of the street. The next shot shows a front view of the same street looking back on the scene, and the two cars are no longer on fire and a third car is sitting on top of them, however this car does not crash into them until the next shot - which also shows the first two vehicles back on fire again before all three explode when the third hits them.

It's impossible to call a random civilian phone number from an active-duty missile silo. Also, an actual launch code would be communicated (by radio) to the missile operators only, and just moments before the intended launch.

When Harry places the unconscious Julie in some random shopping cart you can clearly see that a pillow had been strategically placed to make the actress' back comfy. When he pulls her out again at the end of the ride you can see more pillows had been placed under her rear so as to make a totally comfy little nest.

However, the shopping cart is briefly visible when Harry enters Julie's building and already contains the pillows. While convenient and unexplained, it's not a goof. Maybe it belongs to a homeless person. Considering Harry chooses to cart Julie instead of simply riding with her grandparents, this might call attention to alternate explanations of the events depicted.

When Harry crosses the quickly-packed street to reach who he thinks is the helicopter pilot he'd found earlier, the intersection is clear beyond the vehicles stopped on the left of screen, and when he reaches the other side the camera pans around to show the cross street is completely empty. Therefore there is no reason for the cars to be stopped, as even discounting that the road is obviously clear in front of them, they could all just turn right and drive off that way to flee.

When Harry returns to the diner, after the phone call in the phone ball. There's an reflection of the boom on the window. When Harry gets everyone intention in the diner.

On the phone booth call, Chip told Harry the code to nuclear war. He said the code was "Thor Arthur 66ZZD." In the diner when Landa asked Harry to repeat the conversation, he said the code was, "Thor Arthur 66"DD"Z".

That waitress at the restaurant tells Harry that Julie is in the 351 building on Fuller, but Harry goes to 535 S Curson.

The man who tries to shot Harry for stepping on his car is seen moments before running east towards Wilshire, passing the car from where it is supposed to be in.