Pifias

When Locksley starts his attack on the castle, his men are swimming the moat, pulling across a floating walkway, and being attacked by crossbowmen, who, in turn, are fired upon by Locksley's archers. This same footage is shown again six minutes later.

When the letter given to Ivanhoe by King Richard is first shown; there are various creases in it. However in the following shot where it is shown again; the orientation of the creases has changed.

The shields in this film are made of metal, and the heraldic charges are painted flat - commonplace errors in films. In Medieval Europe, shields were made of wood and covered in dyed or painted leather. The charges were in relief, sculpted in gesso, and colored with paint.

The flat-topped helmets worn by the knights under their mail coifs were worn over them, as in Robin de los bosques (1938). The flat-topped mail coifs of the early 13th century were produced by arming-caps worn under them.

Cloth horse bards (or housings) always covered the horses' tails.

The female characters should be wearing long decorated belts.

The knights' helms in the tournament sequence are all plain metal. In reality they were painted in a variety of colors, including gold and silver.

In the final sequence, apparently Cedric is able to go to Austria and the king is able to reach England in the same time as it takes for Ivanhoe to ride to the court, perhaps a few days. (In fact, when Ivanhoe announces Rebecca's location to her father, he states Isaac has 40 days to ransom her or she will be tried as a witch. The trial takes place after the 40 days have expired and the combat at Ashby is held 3 days later, giving Cedric at least 43 days to reach Austria, ransom Richard, and return to England.)

During the fire at the castle where Ivanhoe and his father and Squire are held captive, one of the soldiers runs to the fight and his sword wobbles and shakes because it is made of rubber.

During the final battle, despite audible reactions from the crowd, the characters seen sitting behind Rowena (Joan Fontaine) during her closeups do not react at all to what is going on in the battle, and, in fact, one man looks rather bored, about to fall asleep.

Characters are shown eating turkey during the feast in Ivanhoe's father's hall. Turkeys are indigenous to North America and were not known in England in the 12th century.

There is no such language as 'Austrian'. People living in modern-day Austria speak German; Richard might also have been imprisoned somewhere in what is now the Czech Republic, where the people speak (not surprisingly) Czech.

The opening credits feature a coat of arms of England supported on the dexter by a lion and a unicorn on the sinister. The unicorn from the arms of Scotland did not appear as a supporter of the arms of England until 1603, when the kingdoms of England and Scotland were united under King James I of England and VI of Scotland.

During the fight in the dungeon, a zipper on the back of Cedric's costume can be seen.

The letter of King Richard, which the illiterate Ivanhoe cannot read, is written in 20th-century English instead of the medieval French that the English court spoke in the 12th century. It also is composed in 20th-century script, instead of the very different script that was in use during the 12th century.