Continuity mistake: When Faramir kneels in front of Sam and Frodo, in the close-up the hand of a Ranger is on Sam's shoulder. The hand and short fingernails are very dirty. After Faramir's lieutenant says, "You know the laws of our country..." the hand and longer fingernails are clean. Then in the next close-up the hand and short fingernails are dirty again. Sam's hood, hair, etc. differ in these shots too.
Picture added by Super Grover