When Nada is falling through Holly's window, a pair of sunglasses can be seen falling with him outside as he first falls to the ground. However, a short time later, Holly is looking at the floor of her place where the sunglasses are now sitting.
As Nada and Frank are trying to get to the roof of the television building, they go down a hall as a particular worker is running away from them. In the next shot, the same worker is even closer to them than before.
During the alley fight, Frank drops the sunglasses and tries to step on them before Nada stops him. The glasses fall on the lenses, but after Nada is kicked in the head and the camera pans down, the glasses are facing up.
Upon completion of their alley fight, Frank and Nada both have blood on their faces. While walking from the alley to the boarding house, the blood has disappeared. Once inside the boarding house, the blood has returned.
When Nada is first hit and pushed through Holly's window, the TV is turned in slightly and blocks a part of the window, but in the next shot from inside of the home, the TV is now square with the wall and is out of the way of the window.
In the TV station Frank and Nada shoot at the two aliens and claim that the glass in that room is soundproof.There is a regular door 2 or 3 steps away though(which they explode a moment later),something that would certainly allow the people on the other side hear the gunshots.