Corrected entry: The central character, the enslaved Cinque, was not seized in Africa and then immediately exported to Cuba out of the slave depot at Lomboko. Cinque was enslaved a few years earlier by black Africans (a common practice) and eventually sold to slave traders.
Corrected entry: When the prosecution is questioning the British naval officer there is an orange, dusk coloured sky behind him, showing through the window. But when Cinque stands up it is broad daylight.
Corrected entry: At the end when the ships blow up the fort, the fort they are blowing up is the "Fuerte San Felipe del Morro" which is in Puerto Rico, not Cuba.
Corrected entry: All through the movie they use a present day American flag, the problem was the movie is set in the early 1800's, so it should have fewer stars.
Corrected entry: During the scene with John Quincy Adams at the Capitol Building, there is a dome on the capitol. The movie takes place in 1839, but the dome wasn't completed until 1863.