Continuity mistake: After Ron throws the burrito at the biker the exterior shot of the car shows he is in the middle of the three lanes. When it cuts to his reaction shot you can see he is now in the left lane. After showing the biker in agony we see Ron getting out of his car in the middle lane.
Continuity mistake: Right after Ron throws Veronica over the desk after she makes fun of his hair, she jumps on his back, and pins him to the floor. In the first shot of the floor, a purse is seen on Ron's right, but the in the next shot of the floor (where she picks up the mace) the purse is on his left.
Continuity mistake: Before the big brawl between the rival news crews there are a number of shots where the sun is nearly setting and a second or so later will be right back up. The most notable one is just after Ben Stiller's Spanish language crew arrive there is an aerial shot with the sun very bright. In the next shot of Tim Robbins the shadow has become much more noticeable.
Continuity mistake: In the aerial shot before the fight scene you can see a white truck parked at one of the loading docks. But when the actual fight happens there is no truck there anymore.
Factual error: In the scene where Ed Harkin calls the bar to ask if Ron Burgundy is there, you can see a calendar to the far right of the bartender. It is the calendar for July, and the 1st of July is a Tuesday. 1975 is the only year in the 1970's that this could be possible. "Afternoon Delight" (the song the news team sings when Veronica Corningstone is introduced) wasn't out until one year later, July of 1976.
Continuity mistake: After the biker gets the burrito thrown at him and falls to the ground, there is a shot of him from behind where you can see that he undid his helmet buckle. But in the next shot of him getting up, he undoes the buckle again.
Factual error: The movie takes place in the 1970s, yet the Channel 4 news van is an early 1980s model Dodge Ram Van.
Continuity mistake: In the scene when there is a question mark written on the teleprompter and Ron says, "I'm Ron Burgundy?" you see a shot of the teleprompter and the question mark is visible. However, what's written on the teleprompter and what Ron says before this are two different things. Ron says something about the panda, but the teleprompter says something about a blind man and his pet falcon.