When Christopher defends Vito's children to Paulie, he's leaning against the back of his chair, one arm draped over it. In the next shot, as Tony walks away from Paulie, Christopher is leaning forward, both arms on the table.
In the rainstorm when Vito's car is damaged the newspaper he holds above his head vanishes and reappears.
When in Melfi's psychiatrist's chair, Tony refers to Senator Santorum (R-FL) as Senator "Sanitorium."
After Meadow reveals to Carmela and Rosalie what Finn saw Vito doing to the security guard, Tony comes downstairs singing "Aqualung" by Jethro Tull, but the words do not match his lips.