The video version of the film, released prior to the terrorist attacks on the World Trade Center on 11 September 2001, was recalled because it contained a Spider-Man (2002) preview that included a shot of the World Trade Center.
For the scene when William follows Jocelyn into the cathedral, the sounds of his horse's hooves were produced using coconuts on Charles Maynes' garage floor.
When William first sees Jocelyn and follows her into the church (on horseback) there is scaffolding around the door and men working on it. Two minutes later when he is ejected by the clergy, the scaffolding has gone.
This is a satirical romance, not a historical documentary. While nominally set in the middle of the 14th century (when Edward the Black Prince and Geoffrey Chaucer were active), it freely amalgamates the costume, custom and slang of many different centuries to create a unique world. The Chaucer character (who mentions his signature Canterbury Tales) bears almost no resemblance to his historical counterpart. Matte replicas of the London Eye and the Eiffel Tower are included to drive home the anachronistic intentions.
Chaucer identifies himself as a writer and describes what he can does. The activities described are part of the profession of cleric (later called "clerk" in English).
Answer: "You have been weighed, you've been measured, and you have been found wanting." Delivered initially by Rufus Swell, it refelcts the "Writings on the wall"."I will fong you" and "Pain. Lots and lots of pain!" is said numerous times by Wat (Alan Tudyk) when threatening to beat up someone.
Q
What song is playing when William is dancing with Jocelyn?
A
'Golden Years' by David Bowie. The complete 'A Knight's Tale' soundtrack can be found here with scene descriptions.
Q
What are the differences between the Theatrical Version and the Extended Cut?
A
The Extended Cut of A Knight's Tale features more than 11 minutes of "new" footage. Not all of this scenes are that new, because they were also featured as Deleted Scenes on the first DVD release of this movie. Fans might like this longer cut and they can find a detailed comparison between both versions with pictures here.