Continuity mistake: When Pomfritt is fighting the soldier at Chateau Neuf, the soldier is wearing a hat, but when the soldier smashes a bottle of wine with his sword in the next shot, the hat has disappeared.
Continuity mistake: When Pomfritt is fighting the soldier during the fight at Chateau Neuf, the soldier slashes the tapestry with his sword and cut marks appear. When we see the two fighting a little later on, the cut marks on the tapestry have disappeared.
Audio problem: When Sir Rodney Ffing is disguised as Robespierre, his lips don't match what's being said. Plus when him, Darcy and Pommefrit are leaving, as he says "You two, come with me", his lips aren't moving at all.
