When Jaime Somers is talking to Abe Vigoda's character, the mole above her lip suddenly disappears and reappears by her left eye.
When Jaime re-enters the mansion after jumping down from her bedroom window, the kitchen cuckoo-clock reads 11.00, yet just shortly later, the grandfather clock that is also shown in the old miser's painting strikes 8:00. And then shortly afterwards, the day is shown dawning, so this would be long before 8 in the morning.
Jaime jumps down from the ledge outside her bedroom window, and the mansion is obviously towering much higher behind her than just the level of the floor that her room is on. Yet in the wide-angle shot of her starting to come sailing down through the air, she is jumping from the roof, with just the open sky above her instead of the upper wall of the mansion.
The red "transmit" indicator on Oscar's radio doesn't always light in synchronization with his sending a message to Jaime.
The butler doesn't bite the end off the cigar before he lights it.