Bad Foley work (Duvall eating the chocolate)
Late in the film, when Duvall buys the chocolate bar and begins eating it, you can hear an audible snap each time he takes a bite. Now, it looked to me that the grocer just had the bar in his display case; I didn't see a freezer. And yet for chocolate to be audibly masticated, it would have to be quite hard, as it might be when frozen. It's all the more silly when the preceding dialogue was all about how it was smooth and "melts in your mouth".
Why the director and editor decided to leave this Foley work in the film is odd. Maybe they just overlooked it. And I know it's not really a major point (to understate things). It just annoyed me when I watched it. It sound like Duvall is chomping down on a candy cane, not savoring a chocolate bar.