An old lady gets stabbed with a three-pronged pitchfork and four prongs come out of her back!
Towards the end of the film a woman gets attacked after running away from hers and her boyfriend's broken down car. You see a zombie eating what is supposed to be her severed right hand but in one of the following shots you can see her right hand still attached to the body
Tom Corman (Raymond Roberts) states that germ warfare wasn't used until WW II, but in fact it was used by the Germans in WW I, and even earlier when Black Plague victims were used to poison water supplies, etc.
A character complains about walking home in the dark. When she walks home later it's obviously broad daylight.
The hand holding the sparkler used for the falling meteorite effect is clearly visible.
During the opening scene of the journalist on the typewriter, the sounds of the key strikes do not match the visual of the writer using the typewriter, nor does the carriage return being used show up in the soundtrack.
When the blonde woman is coming around her car towards her house, she trips over a cable or wire from the equipment
When the trapper hears the woman screaming in the water, he stands up and you can see his fly is open.
The second blonde swimmer to be attacked accidentally looks directly at one of the approaching zombies but doesn't react until seeing a second one.