When Bobby Diggs and Mecca are on the observation deck of the Empire State Building, shortly after Bobby mentions not having a single beat ready for Deck, the Golden Sachs Tower is visible across the Hudson River in Jersey City, N.J. but it shouldn't have been there. The Goldman Sachs Tower wasn't completed until 2004, roughly 9 years after this period in the Wu-Tang Saga.
When RZA and Puff Daddy talk on the street, the actor that plays Puff's bodyguard keeps looking directly at the camera.