Goofs

When Ernie is carrying Aggie's cello, the angle at which he holds the cello changes between shots.

Near the end, when Ernie and Henry are talking and they go their separate ways, the amount and location of moisture on Ernie's coat changes between shots.

Ernie states he's smelled the street "almost five times seven years" - making him almost 35 years old (to match Cary Grant's apparent age in the film). Later, he explains to Henry that he got his middle name of Verdun because that is where his father died in World War I (known as The Great War before WW2), which means he would have had to be born after December 18, 1916.

Near the end when Ernie visits his mother in prison, he gets up to leave, and she is laying on the bed with her head all the way to her left. One second later, as he walks away, her head is all the way to the right side of the pillow.

The plaque shown of the British Unknown Warrior is a studio reproduction. The second line, "OF A BRITISH WARRIOR" is in slightly larger type on the actual one. (However, they did correctly place it at an angle to show the stones run on the floor of Westminster Abby.)

When Ernie and Henry are talking at the end, planes fly can be heard flying overhead. As they look up at them, the planes cast shadows over Ernie. However, it's obvious the shadow effect is done by hand tinting each frame of film as the edges of the shadows are extremely sharp, and they jump around slightly from frame to frame.

As Ernie and Henry part at the end, a flute is playing a slow, sorrowful dirge. There is a flautist leaning against the wall, and it appears that he should be the one playing; however, his finger movements are more along the lines of a fast jig than a slow dirge.

When the car hits the truck, a cable pulling or holding the car, is visible.

(at around 1h 15m) Ada misstates a well-known idiomatic proverb by remarking: 'You can't eat your cake and have it too.' The actual expression is 'You can't have your cake and eat it too.'