Corrected entry: When the old woman calls for the 13 warriors in the beginning of the film, we see one man volunteering at a time. When the sixth warrior volunteers, Ibn's friend tells him "Eight." In fact, only eleven warriors are chosen including Ibn, not 13. (00:11:00)
Corrected entry: When the Wendol come down from the mountain and Ahmed and a viking see them at the guardtower it is daylight. But when the Wendol attack the village it is night. Do the Wendol really take so long to ride on horses?
Corrected entry: Before the village is attacked, Ibn catches a chainmail armor which is thrown to him. He then, very easily, slips into it as if it were made of plastic. If it was real chainmail, it would weigh about 60 pounds. Also, the usual way of dressing up in chainmail armor is to "roll" it on inside out, and the weight would require the assistance of a second person.
Corrected entry: In the scene where Ahmed and his friend first arrive in the viking camp Ahmed says "try Greek" but the language his friend speaks is Latin.
Corrected entry: Ibn uses the metalworking equipment in the village to reshape the Viking broadsword he was given into a scimitar, all well and good except he's from Bagdad and at the time this movie was set the scimitar wasn't used by Arabs in Persia.
Corrected entry: No one in the court of the Calif, or in Bagdad at all, is bearded. Then, as now, it was a custom of all Arabs to grow beards.
Corrected entry: The average size of European horses during that time was about 1.35m, equal to that of modern ponies. Ancient Arab horses are said to have been only slightly smaller than modern Arab horses (1.45-1.55m). Thus Ahmed Ibn Fahdlan's horse might have been bigger than those of the Northmen (who, like the Wendol, ride modern sport horses in the movie).
Corrected entry: In the scene after the first man-eater attack Achmed and one of the vikings drink mead from a horn. When the viking first drinks the horn is a steep curve pointed upwards. As he is drinking the camera cuts to the opposite side and suddenly his horn is pointing downwards. When Achmed drinks from it the horn is suddenly curved slightly in two places, rather than the earlier one.
Corrected entry: The Vikings are supposed to all speak the same language (which is one of the reasons Ahmed manages to learn it). They even refer to it when asking Ahmed "How did you learn our language?". The only problem is, they are NOT speaking the same language. The messenger boy and the old crone both speak modern-day Norwegian, the other 12 warriors speak a mixture of Danish, Swedish and made-up words that don't make sense. Buliwyf himself sounds strained and unnatural, as if he has learned his lines phonetically.