Goofs:
Revealing mistakes: Presumably, the "conversation" was recorded over the noon hour. In the opening shot, the shadows are much too long for mid-day, even in winter. (more)

Trivia:
The meaning of Harry's last name, Caul, is a fetal membrane sometimes present at birth. This ties in strongly with both Harry's transparent rain jacket, which he wears for the majority of the film, and also the fact that Harry is occasionally viewed through a translucent sheet of plastic when threatened, such as by his rival during the party scene. (more)

Filming Locations:
Alamo Square, Hayes Valley, San Francisco, California, USA (more)

Quotes:
[about a bum on a park bench]
Ann: Every time I see one of those old guys, I always think the same thing.
Mark: What do you think?
Ann: I always think that he was once somebody's baby boy.
(more)

Awards:
Nominated for 3 Oscars. Another 10 wins & 11 nominations (more)