While Fraser at age 3 crawls out of his bedroom onto the roof, his older brother, young Rollo in short pants with suspenders (in a shot from behind at 02:27), is on the lawn holding a tennis racket, but (at around 28 mins) the scene cuts to a frontal shot where young Rollo's hands are empty. Later (at around 33 mins), he holds the tennis racket again.
The Boeing-Stearman Model 75 trainer shown in this film was not introduced until 1934.
At 1:06:23, Edward pretends to blow his nose, but makes sound from his mouth.
(at around 53 mins) When Edward crosses stage right to Uncle Morris MacIntosh a reflection of the boom mic is clearly visible in the glass covering the artwork on the back wall.