The framed caricatures that line the walls of the Sardi's set are black and white sketches that include at least one movie star (Charlie Chaplin); in reality, the caricatures at the actual restaurant in New York are in color and, because they only honor celebrities connected with the Broadway stage, would certainly not have included Chaplin.
Crux of plot hinges on efforts of a Broadway producer and playwright to find ideal actresses to star in a play about a troubled mother/daughter relationship. Yet when the pair attends a summer stock production of the play, large poster outside theatre only includes photos of actress playing daughter and two male co-stars - completely ignoring actress who plays crucial mother role that's been talked about throughout entire film.