Other mistake: When the thresher blows for the second time, Mr. Ages slides down it into a large chamber into a basket. When he falls into it, he is translucent for a second.
Other mistake: Rupert almost got to the end of the cue cards when he flips too quickly the one saying "Alive", partially hidden behind another he is holding in his hand, showing the one saying "again" too early. So Jerry asks him to go back. And he does, only to bring then from behind "again." There is a small bit when De Niro is off-camera, but for this sequence to go as shown, he would have slipped to the bottom/the back of the pile the "again" card that was already at the top and then put in its place one of the two he had already in hand, the correct one, "alive." The fact that "again", that was at the top of the pile, is pulled from the bottom instead, makes no sense. (01:08:50)
Other mistake: When Conan gathers flowers to "take to the girl", the flowers that he is holding as he mounts his camel, are very long-stemmed, and dark purple in color. In the next scene he is riding the camel and the flowers he is holding are not only very changing color as another post indicated, but they are also very fake plastic / fabric flowers. In the same scene, Conan is then seen wearing a strong of flowers around his neck, those too are very fake flowers. (01:05:00)
Other mistake: The scene where Robin Ignico mentions Annie's new dog Sandy "but there's no bite in him," Lucy Stewart can be seen re-mouthing Robin's line.
Other mistake: When Sid committed suicide, the coroner brought him out of the office...not his room.