At the 9:13 mark, Barbara Stanwyck is holding a cigarette in her right hand, while reaching into the coat pocket with her left hand. Next we see both her hands opening a wallet, then cut back to her holding up the cigarette in her right hand.
When Jerry and Kay are out on the roof at night, the stars are twinkling in the background, but at one point the stars that should be behind Kay (i.e., not visible) are superimposed on her face.
Although the onscreen credits state "Adapted from A David Belasco-Milton Herbert Gropper stage play," only Gropper was the author of the play; Belasco produced it.