Swedish Public Service (SVT) withdrew support from the project only months before its release, citing lack of quality and unsatisfying amount of material as main reasons. The studio (SF) instead claimed the disagreement was due to budget concerns. Rival broadcaster TV4 stepped in as co-financier.
Upon the call for a halt in the dessert at Hattin to raise tents, the Grand Master is implored not to stop for the night, "we must find water!" In the next shot of the raised tent's there is clearly a stream running through the foreground.
When Arn and Cecilia are walking through the woods, Cecilia is petting Arn's horse. The angle changes and she suddenly goes from having her hand on its nose to having both hands on her horse's reins.
When Arns mother is about to die, he walks outside the monastery and sees a man practicing with a bow. At a distance, you can see the man shoot his third arrow. But when closing up, he shots again, this time it is also his third arrow (in both shots you can see two (2) arrows stuck in the target).