The first close-up of Charlie's white shoes with blood on them also shows Ira's black shoes right next to him, but Ira doesn't walk up to help Charlie until the following shot.
In the final scene, as Ira and Margo leave the cemetery, the sign is misspelled Hollywood Cemetary.
Margo complains, after tasting her drink, that it is Pepsi, not the Coke she ordered. She later pours more from the initially out-of-shot Pepsi can. She would have known it was Pepsi from the can, either when Charlie poured the drink or when he put the can on the bar.