Continuity: The movie takes place around the time of WWI, definitely before 1923. In the carnival scene, the calliope is heard playing "Ain't She Sweet". This was the number one song ... in 1927.

Continuity: When James Dean's mom writes out a check for $5000 and gives it to him, she licks the envelope first, but when she actually hands over the envelope to him, it's clearly not sealed.