Meryl Streep begged director Alan J. Pakula for this role literally on her hands and knees. Marthe Keller and Barbra Streisand both tried to win the role also but Pakula ultimately chose Streep.
When Nathan toasts Stingo on the bridge, as the shot pulls back you see first one then several cars from 1982, obviously an issue with how long they could hold up the bridge traffic for the shot, they needed to hold it up an extra minute or maybe lacked the budget to pay for late 40's cars to drive by instead.
In one of the early scenes when Stingo is moving in he is carrying 3 cases of Spam on his shoulder. They barely move despite him writhing around to get the door open. When he gets into the room he drops them on the bed and you can clearly see most of the cans are glued to the cardboard. The actor even flips the top row over on the bed and they stay attached.
Slavic surnames ending in -ski/-skiy are, in Slavic grammar, considered adjectives, and so the female form is -ska. Sophie's and Eva's surname should therefore be Zawistowska. Moreover, it is unlikely for Eva's name to be spelt with a 'v' as the proper Polish form is 'Ewa' ('v' does not appear in the Polish alphabet and is only used in foreign names and loanwords).
Nathan Landau: On this bridge on which so many great Americans writers stood and reached out for words to give America its voice... looking toward the land that gave them Whitman... from its Eastern edge dreamt his country's future and gave it words... on this span of which Thomas Wolfe and Hart Crane wrote, we welcome Stingo into that pantheon of the Gods... whose words are all we know of immortality. To Stingo!