Rick was eating an apple before bed. He placed it on the bedside table. Upon arising hearing the cries, you see the table without the apple core. After he returns to bed you clearly see the apple core on the table.
The covers on the headlights (see above) disappear midway through.
In the final scene, Lizzie Flynn's cat is sitting placidly grooming himself on the stairway at Windward House, when he should be at the Jessop Farm with Lizzie.
In the opening when Roderick and Pam are seen in the opening shot clambering up the coast cliff, Pam's trenchcoat is seen blowing up, and there's no sign of anything underneath, but in the following shot done obviously a black skirt, not seen in earlier shots, is shown.
When Roderick and Pamela first visit Miss Holloway's institution, they are ushered into a waiting area, where Pam sits in a chair while Roderick stands facing her. In a medium close up of Pam, Roderick's shadow is clearly visible on the wall behind her next to her chair. However in the very next shot showing both of them, there is no longer any shadow on the wall behind Pam, even though Roderick has not changed his position. Moreover, the shadow in the close up shot is in profile, but Roderick is facing directly toward the wall.
When Roderick and Stella are sailing in a small boat, she did the old chestnut of hitting him on the back of the head with the boom. However, Stella pushed the tiller. That would have sent the boom to starboard, away from Roderick's head. The background didn't shift either.
Roderick is awakened at night by the sound of a woman crying. He lights a candle then goes into the hall. At one point as he holds the candle in front of him, his shadows is cast NOT behind him (where it should be), but to his right (meaning that this candlelight makes a 90 degree turn when going by him, undoubtedly a first time occurrence in the history of the Universe!).
The film is set in 1937, but the "going-to-church" sequence features a car with headlights blacked out in the style required due to WWII in the early 1940s.