Shortly after filming had begun, Thomas Mitchell fractured his skull and was replaced by Edward Arnold. Not many scenes had been shot, none were reshot, so Mitchell is still visible in some scenes. [Note: entries in the Trivia section indicate that all of Mitchell's scenes were reshot.]
When Ma is mending and talking about Mary in labor, Ma's hand jumps to being held by Jabez.
When Webster falls asleep in the carriage in Cross Corners, the position of his hand and arm changes.
Characters in this film set in pre-Civil War America routinely use the phrase "loan shark" despite the fact that it came into the English language between 1900 and 1905.