Character mistake: Shortly after Jeff Sheldrake fires his secretary Miss Olsen, he contacts Personnel to get Baxter's phone number. When talking on the phone, Jeff says that Baxter is in Ordinary Premium Accounting and forgets that he promoted Baxter to an executive just weeks earlier.
Character mistake: At the very end of the movie, Jack Lemmon begins dealing cards for the gin rummy, but he deals about 14 cards before the fade to black, in a 10 cards game. (01:59:45)
Character mistake: The protagonist at the beginning of the movie is cleaning his own apartment when Kirkeby returns for the missing galoshes of his lady companion. Kirkeby searches a chair, looking also down on the floor to the side of it, turns around and looks up the other one and then back towards the starting point. He picks the galoshes a few seconds later finding them in a spot where he supposedly has looked already almost all the time (the actor just pretended to look). (00:06:40)
