Continuity mistake: When Levene says he will promise it will be OK, he uses his right hand's index finger to hang up the telephone, but in the next shot his middle finger is used. (00:03:00)
Visible crew/equipment: When Levene hangs up the phone after saying "I can't be reached I'll get back to you" the boom microphone is visible above him. (00:03:45)
Visible crew/equipment: When Levene is on the phone to a sales prospect he says "Danny that piece of property I had for you has increased in value, Grace, Grace what was that figure? Seventy-six thousand dollars." During that time the boom microphone is visible at the top right of screen. (00:22:00)
Visible crew/equipment: A boom mike is briefly reflected in the office window when Lemmon and Spacey are arguing in the closed office. (00:25:45)
Continuity mistake: When Levene offers $30 in Williamson's car the notes are outstretched in his left hand. As he continues talking Levene folds the notes in half with his left hand. In the next frame when the camera angle changes the notes are outstretched again. (00:29:00)
Continuity mistake: When Roma and Aaronow are discussing the cops and who broke in last night, Aaronow's left hand changes position several times during shots and camera angles, from his mouth then down on his lap. (00:54:00)
Visible crew/equipment: When Levene is describing his big sale to Roma, Levene takes off his jacket. When he does the boom microphone is visible above. (01:01:50)
Plot hole: After the robbery, Williamson asks Roma if he's going out, and Roma responds, "With what?" because the robber took the Glengarry and Rio Rancho leads. However, no one had told him that.
Plot hole: After the robbery, Ricky calls Mrs Link to thank her for dinner. Later, he goes to make a phone call, only to discover that the phones have been stolen.