On season two's One of Our Bottles Is Missing (1967), Mrs. Bellows has a copy of Jeannie's bottle made for herself, but in the Hollywood hotel room, Dr. Bellows sees Jeannie's bottle and asks Tony what it is.
When Tony is in the store trying on a sport coat, his necktie shifts and you can see he is missing the second button on his shirt.
When Jeannie is in her bottle and she puts on her gas mask and produces a skunk, the picture is not inverted as it was previously, but her hair and scarf are still being held up by wires as in the previous inverted shots.
Jeannie and Tony get their photo in the newspaper yet later in the series it is revealed that Jeannie cannot be photographed.