Character mistake: In the scene where Carrie is printing an article she has written, the title reads: The Terrible Two's. A successful, educated writer would never have used an apostrophe to pluralize a word. Ever.
Character mistake: At Henley, Prince Albert of Monaco is introduced as "His Royal Highness Prince Albert." He is a Serene Highness, not Royal. A British VIP would know the difference and say "His Serene Highness" instead.
Character mistake: Ben Kingsley is Dr. John Cawley. But he is called Steven when the doctors are grouped together discussing how to handle the patients due to the hurricane, right after the graveyard scene.
Character mistake: In the scene when Dave is checking out the failed transmitter at the radio station, Dave says "the bad news is your return loss - way too high". This is a mistake, as the movie makers got confused between the terms "return loss" and "insertion loss". Dave should have correctly said either "your return loss - way too low" or "your insertion loss - way too high".
Character mistake: Engine #1206 is instructed to take the nearest siding upon hearing the news of the oncoming train. Frank does the maths and determines that they will not fit into that siding. He states the siding being 4011 feet between signals, with about 2500 of actual usable space. Engine #1206 with 25 cars would only equal 1580 feet, giving them more than enough room to clear in the first available siding.The average length of a railroad car is 60 feet. Even if the cars were considered "long", total 25 cars would have fit into that siding.
Character mistake: Dr. Stonehill posts a sign that says "KEEP YOUR DAMN FOOD AND DRINK OUT OF MY REFRIDGERATOR !" Refrigerator is spelled wrong, "REFRIDGERATOR" as if the word is "Fridge" which is isn't. (00:52:00)
Character mistake: Mattie attended a travelling Old West show in Memphis in which Rooster Cogburn was a performer. The flyer for the show shows the date of the show as July 18, 1903. The day of the show Mattie was told that Rooster died three days earlier (July 15, 1903). But Rooster's tombstone lists the date of his death as August 12, 1903. (01:41:55 - 01:43:35)
Character mistake: When Johnny and Cleo leave the Chateau and head for Vegas, they are shown getting on the 101 freeway North (in Hollywood) and are coming from the east and turning right onto the freeway. The Chateau is in West Hollywood so to turn onto the freeway where they did, they would have come from the west.