Continuity mistake: When James is eating at home alone, he flips his spoon into his water glass. In some shots it's leaning against the right side of the glass, and in other shots it's against the left side.
Continuity mistake: As the family is piling into their car to go to the costume party, Jim, who is carrying a large, balsa sailplane, accidentally snaps the tail and it falls sideways. In subsequent shots the tail is upright.
Continuity mistake: When Jim finally recognizes his mom, he hugs her with his arms outside hers. In the following shot from behind Jim, his arms are under his mom's.
Continuity mistake: As the internees begin the long march they leave through an arched gateway. A bonfire burning outside the gates changes sides from one shot to another.
Continuity mistake: When Jim's mother (Mary) is sitting on the bed talking to Jim, she lights up a cigarette and holds it in her left hand. As she continues to talk you can see cigarette smoke rising above her hand off-screen. When Jim's Dad comes in and Mom gets up off the bed the cigarette is gone and a glass of water is now in hand.
Continuity mistake: Jim eats almost all of his rice, but when Basie tells him to chew everything six times, Jim's plate is filled with rice.
Continuity mistake: When Jim steals the soap, the laces in the boot on the right change positions between shots.
Continuity mistake: When the food Basie is preparing on the boat is shown for the first time, there are pieces of meat on the pan. In the next shot, they are all gone.
Continuity mistake: When Jim is in bed and tells his mum about God, his hands swap between crossed over his tummy or next to his head, depending on the angle.
Continuity mistake: When Jim's car approaches the beggar on the sidewalk, in the wide angle Jim is sitting on the far right. In the close-up he is sitting on the far left.
Continuity mistake: Jim passes twice by the same part of the Gone with the Wind poster.
Continuity mistake: When Jamie is about to steal the soap, he places the boots on a plank right next to a beam. In the next shots the beam is much further away.
Continuity mistake: When the Doctor is reading the lesson to Jim and he plays with the stethoscope, the paper by the edge of the table changes positions between shots.
Continuity mistake: When Jim throws the marbles on the plank, their position changes between shots.
Continuity mistake: When Jim is by the window flashing his torch, the position which he holds it swaps from waist level to head level between shots.
Continuity mistake: After Jim grabs the marbles, a boy with brown hair stands up, and a blonde one stays on the floor. When the angle changes they've swapped positions.
Continuity mistake: When Jim meets Basie, the spoon on the pan changes positions after he grabs Jim's glasses.
Continuity mistake: When the mosquito net is being put by the dead man's bed, the shoes on the floor keep changing position between shots.
Continuity mistake: Heading for the costume party, the blood splatter on the window changes size and looks between shots.
Continuity mistake: When heading for the costume party, when Jim leans to see the crowd, his hand is on/off the car's window.
Chosen answer: The first time, Jim says "Nanika no machigai desu. Bokutachi wa minna tomodachi desu yone. Senso no sei desu." This roughly translates to "There has been some sort of mistake. We are all friends aren't we? It is the war's fault." The second time, Jim only says "Nanika no machigai desu. Bokutachi wa minna..." and then gets pushed aside. "There has been a mistake, we are all...". I hope that helps.