Arthur's castle has a drawbridge, but not a moat.
Knights would not have worn chain mail when just travelling between castles nor when visiting their lover's bedrooms.
In the main battle scene, a soldier - apparently thinking he was out of camera range - can be seen at the bottom of the screen standing with an arrow sticking out of his shoulder and smoking a cigarette.
In the final battle scene, a white horse is held down so that it appears to be dead, but it can be seen to be breathing.
Guinevere's dresses have zippers, not buttons nor ties. Guinevere can also be seen to be wearing a bra.