During the opening sequence, the front door to the Bundy home is white. The door, however, is actually red during the show.
As Marcy makes coffee for the men, she turns on the tap to get water from the sink. Running water is heard, but it's obvious none is coming out.
During the series, the story about how Al and Peggy got married changes a few times. At one time Al says he was drunk and unaware that he was marrying Peg. Later, he claims that it was a shotgun wedding. He tried to flee the scene, but Peggy's father, Ephram, held Al at gunpoint during the wedding.