During the scene in which the narrator states that the average IQ of mankind dropped drastically over time, they did not take into account that the average IQ of mankind is always 100, with test results adjusted to keep 100 as the center value. The average IQ graph should have been a flat line staying at 100 points. Though this system may have been abandoned at some point during the rapid decrease of human intelligence.
When the camera lands, it is in a row of sprouted plants with another in the background. When Frito picks up the camera, the row the camera is on and the row on either side are barren - Frito has to go two rows over to film the plants.
During Monday Night Rehabilitation, the "assdozer" tries to drive through the tunnel, but is too big. When it plows into the wall, a man is at the entrance of the tunnel. When the wall collapses, a second man appears at the bottom next to the first man. The first man runs out of the way, but the second man is crushed underneath the debris.
During the Costco scene when Joe first sees the Starbucks, the sign says
Extra foam: $500,000,000.
In the next scene however, the sign says
"Hot" latte: $2,000
"Full body" latte: $50,000.
At the cut to the close shot during the motorcade down Pennsylvania Avenue, the buildings along the street vanish, leaving Pres. Camacho's bike and the bus against an empty sky. They reappear at the cut back to the long shot.
Incorrectly regarded as goof: After Rita is captured and brought to Joe, she says "I thought you were in jail. How'd you get to be the Secretary of the Interior?" Even though no one had told her what Secretary he was, "Secretary of the Interior" was written on his shirtsleeve.
When Rita is captured and brought to Joe, she sees him and exclaims: Joe?
The Secretary of Defense then says: That's "Not Sure" ma'am. Secretary Not Sure.
Rita replies: Secretary? Secretary of WHAT?
Joe then takes her away from the group to explain what is happening, and Rita says "I thought you were in jail? How'd you get to be the Secretary of the Interior?"
She couldn't have known this, as neither Joe nor anybody else at that point, had told her what Secretary he was: the Secretary of the Interior.