In the beginning, when Stark and Maya are in the bedroom, Stark is sitting on the right side of the bed. However, once the plant explodes and Stark is tackled by Happy, he is suddenly lying on the left side of the bed.

When Jack retreats to the cabin for the first time in the film, he puts a Led Zeppelin record - Led Zeppelin II - and plays the first song on that side of the record, which turns out to be 'Ramble On'. Any Zeppelin fan would know that 'Ramble On' is song number 7 on side B, therefore the needle should have been placed somewhere in the middle of the disc.

The glass on the windows on skyscrapers like the one in the skyscraper/assassin scene is specially made for high altitude building and is usually very thick (4-6 cm thick, as seen by the section the sniper removes), this means that during the subsequent fight scene it would have been impossible to break that window just by bumping into it.

The film is based in 1858 and proceeds through the winter into the spring of 1859. At the end of the movie Django blows up Candyland using dynamite. Dynamite was not invented by Alfred Nobel until 1864 and then patented in 1867.

Bradley Cooper wears a necklace. While rehearsing a dance sequence with Jennifer Lawrence the necklace is alternately hanging on his chest then back, indiscriminately between cuts.

Grug's loin cloth gets ripped by a lion at one point. The rip magically fixes itself just moments later.

Throughout the film, Glinda's hair continuously changes from being curled to straightened to curled again. This occurs often, and on occasion within the course of a single scene (for example when she introduces Oscar to the residents of Oz).

In one earlyish scene Spock and Uhura are in a turbolift - you can see Zoe Saldana has a faint spot or similar on her upper lip that's been covered up. In scenes following there's no sign of it.

The movie takes place in the summer of 1922. They played Rhapsody in Blue, which wasn't written till 1924. The bandleader is obviously Cab Calloway. Cab Calloway's first recordings with the Missourians weren't until 1928. "Oh! You Have No Idea" also wasn't recorded until 1928, and it was sung by Sophie Tucker, not Josephine Baker (although they do credit Ms. Tucker in the final credits).

In the scene where the Swissair 747 is taking off from Tehran the police cars keep up with the plane until it lifts off. Takeoff speed for a 747 is about 160 mph so the police cars would have been far behind by then.