Continuity mistake: Langston is speaking to his mom on the phone. The reverend is by the entrance. When Langston says "Oh, I understand" you can see that the red scarf pops in view at different heights between the wide shots and the tighter angle. (00:46:40)
Continuity mistake: First evening at the Grandparents' house in Harlem. Langston says that it's like a museum of "black people." Forest Whitaker has both hands on the book, but before the cut they are distant, after the cut they are joined. (00:22:00)
Continuity mistake: Having just reached New York, Langston tries to reach by public phone Reverend Cornell Cobbs. The receiver is in his right hand, until there's a cut to the reverse angle and the phone switches to his left hand. (00:12:30)