Unintentional Time paradoxes/anachronisims:
1. Dazed and Confused - When Mitch goes to purchase beer at the convenience store, a Coke dispenser with a logo first introduced in 1985 is visible. The film is set in 1976
2. Braveheart - Watches visible on some of the extras.
3. Jarhead - Marines listen (and sing along) to "O.P.P" nine months before it was released
4. AngelHeart - Long shot of Rourke walking down the street of NY circa 1958 with a long line of period cars and the crosstown traffic at the bottom is modern. You don't notice it until a sunlit white van goes across and draws the eye.
5. Hurt Locker - A scene features a soldier playing an Xbox 360. The movie is set in 2004; the Xbox 360 was released in 2005.
6. Four Musketeers (1974) - The heat Milady's packing in one scene is a mid-1800s Derringer percussion cap pistol (what killed Lincoln.) Couple hundred years off.
7. Pearl Harbor (2001) - When young Rafe and Danny are playing in the biplane at the beginning of the movie, the year is 1923. The airplane appears to be a Stearman trainer, which was not built until 1936. Plus, they inadvertently started the engine from the cockpit, which would have been impossible in 1923 since there were no electric starters at that time. One of them would have had to swing the propeller by hand to start the engine.
8. I'm surprised Steve hasn't chimed in with this:
The Good, The Bad and The Ugly is filled with misdated weaponry. All the main pistols keep changing from period correct nib & cap when they carry to later era cartridge when fired. The long guns are cut down Winchesters made to look like Henrys and when Tucco is assembling his gun, amongst the parts is a modern .38.
9. Dazed and Confused (no one said not to mention a movie twice) A teen is wearing a Rock and Roll Over KISS t-shirt in June of '76......the Rock and Roll Over album was not released until the Autumn of that year.
10. The Caine Mutiny (1954) - The court martial took place in 1944 during the war. An exterior shot of the Navy Pacific Fleet headquarters in San Francisco clearly shows early 1950's Fords parked in front of the building.
11. More weaponry: The Searchers (set in late 1860s) John Wayne's character has a Winchester 1892 lever action carbine.
When I find myself in times of trouble, I say 'boy, you gotta carry that weight.' I am he, you are he, you are me, we are all together, speaking words of wisdom. Come together, right now. Amen.