In Walter White's backyard, the outline of a fire place is next to the sliding back door. Inside the reverse wall is the dining room/kitchen. The fireplace should be on the side of the house.
Every depiction of the drug money being counted or transferred in large quantities (ie in bags) shows absolutely pristine notes, whereas the occasional shots of money being exchanged for drugs show crumpled, folded notes.
In multiple episodes the view in the rear view and side mirrors is reversed, making it appear that the driver in the trailing car is sitting in the right front passenger seat.
Don Eladio is a Mexican drug kingpin. However, he speaks Spanish with a Cuban accent. The actor portraying the character, Steven Bauer, is a Cuban-American.
Great pains are taken to show how well the super lab is hidden with a secret entrance underneath a giant laundry machine. However, there is also a large freight elevator used to bring down the vats, forklift, and barrels of chemicals. The lab is hidden in a one-story building, which means the freight elevator can only go down. There is no explanation for both a secret entrance as well as a not-so-secret freight elevator.
In the opening credits, letters in the names of the cast and crew are highlighted in green to represent chemical element symbols. However, the "Ch" in Michael Slovis' name was highlighted in several early episodes, even though Ch is not a chemical element symbol. In later episodes, only the "C" (for Carbon) is highlighted.
In the original release of Seasons 1-4, in the opening titles, both "Br" (Bromine) and "Ba" (Barium) in "Breaking Bad" are shown with an Electron Shell Configuration of 2-8-18-7. However, Barium has an Electron Shell Configuration of 2-8-18-18-8-2. This error was corrected in Season 5 and in the Netflix release of all seasons.