Anchorman: The Legend of Ron Burgundy (2004) was set in the mid-1970s, close to 1976. Walter Burgundy wasn't born yet in that film, yet in the sequel, set in 1979-1980, Walter is now 7 years old.
When Ron and Linda have a saucy discussion, the collar on Ron's jacket changes from being messed up and sitting upright to sitting nicely.
After Ron's failed suicide attempt, the knot in the rope changes from being in his front to his back.
Jet Airliner is credited as written by The Steve Miller Band when in fact it was written by Paul Pena and just performed by The Steve Miller Band.
Crack did not appear until late 1984, while the movie takes place in 1979-1980. (Crack, in fact, appeared in Miami in the late 1970s and become an epidemic thorough the rest of the US from 1981 onward).
The news headlines running at the bottom of the screen during Ron's broadcast do not run in real time - they pause for many seconds during cuts then continue again when cutting back to Ron broadcasting.
When Ron learns that messages about curing his blindness have been kept from him, he effortlessly turns and grabs a lamp and smashes it. The precision of his motion to the lamp would require sight.
The movie is set in the early 1980's but the World Trade Center Towers are not shown when the New York City skyline is shown.
MTV did not exist until 1981, and MTV News did not appear until several years after.
Brick quotes the theme song from Ghostbusters (1984). This film is set approximately five years before that film was released.
During the first sportscast on GNN, the baseball highlights reflect more modern equipment being used, such as the hockey style catcher's mask.
When Ron Burgundy asks, "Know what movie I watch every Christmas?" Brian Fantana says, "Six Pack (1982) with Kenny Rogers?"
In a couple shots of Ron driving toward San Diego, the camera crane is reflected on his van.
At ~1:40, when the camera zooms out right before the fight starts, there's a building in the top right of the screen with an address on it -- 34 Peachtree, making it obvious that this is Woodruff Park in Atlanta, not Madison Square Park in NYC. The distinctive sign for Muse's clothing store is also visible.
The set up shot for the final showdown shows Madison Square Park, but you can tell by the landscaping of the park where the scene is actually shot that it is elsewhere. Also, when Vince Vaughn shows up afterword on the street immediately outside the park, the buildings are not any that front on Madison Square Park, New York City. I noticed in the credits thanks to some Georgia State film board.
An important element of Ron's character is that he can only read exactly what is on the teleprompter, but he starts his first broadcast with "Hello America" but the teleprompter has "Good evening America" on it.
Ron is told by his doctor: "Looks as if both optic nerves are separated from their respective corneas .... No other way to put this, but you're blind". The optic nerve does not attach to the cornea, therefore a separation of the two is a normal finding and would not result in blindness. If the optic nerve separates from the retina, on the other hand, blindness ensues.
The Ghost of General Stonewall Jackson speaks with a Deep Southern (perhaps Mississippi) accent, but Thomas Jonathan Jackson was from West Virginia & Virginia and would have spoken with a central Appalachian accent.
At the end of the original "Anchorman" the narrator tells us that the character of Brick ends up having 11 children and becomes a consultant for President Bush. However, in this sequel, Brick makes it very clear to Veronica that he is not only single, but he's never kissed anyone except a box of cereal and a sleeping boy.
When Ron learns that messages about curing his blindness have been kept from him, he effortlessly turns and grabs a lamp and smashes it. The precision and directness of his motion to the lamp suggest he is not blind.