I was recently watching Pirates of the Carribean: At World's End and noticed a factual error in the movie. During the moment where Captain Barbosa and Captain Jack Sparrow are looking at the map that they received from Sau Feng and I noticed that, on the map, Ponce de León is listed on the map as 1523. However, while doing some easy research on Wikipedia, I noticed that Ponce de León, or rather Juan Ponce de León y Figueroa, died in 1521. I'm curious if movie studios ever do any research before they start filming a movie. Especially when they are referencing real historical figures. Ponce de León, as it's indicated, wasn't a pirate, but rather, he was the first governor of Puerto Rico and was associated with the Fountain of Eternal Youth, which was reputed to be in Florida, which he was the first explorer to, and which he also named. Has anyone discovered any factual errors in movies on Blu-ray that you never noticed before?