As the chain gang escapes, they climb the same embankment twice.
When Louise visits Virgil in prison, the position of her arms and hands change between shots.
During the bicycle sequence Woody is chained in the middle of the prisoners, but when they enter the old lady's house, he is the first man on the chain.
After breaking out with the chain gang, and talking with Louise, the arm position of the first guy in line changes.
Virgil was born December 1935. When he was still a teen, playing cello in the marching band, the year would've been circa mid-1950s at the latest. Cars current to the actual filming can be seen all around the background, as well as the long hair-styles of the boys marching. Most of the characters are also dressed in the late-60s fashion throughout most of the film.
When Virgil is cutting a hole in the window, the camera dollies behind him, and the crew and an audience of bystanders are reflected in the glass.
The camera shadow on Virgil is visible as he walks from the bathroom to the kitchen on the morning of the robbery.
At the two gang bank robbery, when they exit the building, the correction filter sheets covering the glass doors are visible when they open the door.
When Virgil is walking toward the shore of the beach after done eating the one slice of pepperoni, the shadows of the camera and boom mic are visible on his sweat jacket.