When Mack hits the meteorite with the bulldozer, it's completely covered with weeds. A moment later when he and Kelly walk up to investigate, there is only one small tumble weed next to the meteorite.
When the Killdozer destroys the radio it changes from being open with the dials and gauges visible with the microphone in front to being closed with no microphone visible.
When Dennis is standing with his back to the bulldozer, it is unlikely that he would not have heard the hydraulics as the front plate was raised.
The crew is located on an island 200 miles off the coast of Africa. In a scene where the bulldozer is lurking in the bushes, it looks like traffic is moving along a highway in the background, but in fact those vehicles are the two jeeps and the pickup truck making their way up the hill in the survivors' attempt to escape the Killdozer. The vehicles are seen twice beyond the bushes: once moving right to left on one part of the road, then a moment later moving left to right on a higher part of the road.
In the film's intro, an aerial view of the island said to be 200 miles from Africa shows it has one tree-covered hill surrounded by a sandy beach. Later, after the survivors of the initial attack flee up the hill, a much larger landscape can be seen in the background, including additional hills and, much further away, snow-covered mountains, revealing the filming site (probably in the hills outside Los Angeles).
In the film's intro, an aerial view of the island said to be 200 miles from Africa shows it has one tree-covered hill surrounded by a sandy beach. Later, after the survivors of the initial attack flee up the hill, a much larger landscape can be seen in the background, including additional hills much further away.
When Killdozer tries to drop rocks onto Dennis (Carl Betz) he looks up and then runs. A moment later he is shown doing this exact same thing again.
When Chub (Neville Brand) ignites the signal fire, he is standing too close and singes the left side of his face. You see him touch his face when he is running away from the flames. Through the rest of the movie only his right side of his face is shown to the camera.
When Beltran is trying to operate the runaway bulldozer, the controls are all moving back and forth randomly, not affecting the bulldozers actions. Later, the controls are working as they coincide with the actions of the bulldozer.
As the construction crew leaves the camp that was destroyed by the bulldozer and drive away, you can see the shadow of the very tall crane the camera is mounted on.