(at around 1h 11 mins) As Ed Hutcheson and Margaret Garrison are having a private talk, the glass in Margaret's hand switches back and forth between being held in both her hands or being held only by her right hand. Also, the amount of liquid in the glass changes from shot-to-shot.
When Hutcheson (Humphrey Bogart) lies down in his old bed, he remarks on the large picture of his wife's new beau, Lewis Schaefer (Phillip Terry) on the night table, very close to the phone. He then immediately falls asleep. In the early morning he is awakened by a phone call, and when he reaches over and picks up the phone, the photograph has vanished.
(at around 25 mins) Ed Hutcheson, having just woken up, is on the phone and asks what time it is. The answer is 6:20, but the watch on his wrist appears to show about 4:45.
As Rienzi's car drives off after picking up Hutcheson, a large studio light is reflected against the side window of the car.
Ed Hutcheson's dictating headline calls for ten-point type, which would be about one-seventh of an inch high.