When Richie is shaking down Beansie in his pizza joint, there is a round glass coffeepot on the table. When Richie smacks it across Beansie's head, it has changed to a cylindrical shape.
During Dr. Melfi's dream, Tony's prescription bottle has the same ID number, and other identifiers as the bottle usually in Tony's medicine cabinet. Dr. Melli never would have seen this bottle, much less recorded in her subconscious.
In the scene where Janice opens her disability check and looks at it, there is a misspelling. On the check it says "c/o LIVA SOPRANO" instead of LIVIA SOPRANO, Tony's mother's name.
Janice's disability check comes from the treasurer of the county of Olympia - Olympia is the state capitol, not a county (it is located in Thurston county). Furthermore, the zip code, 98569, is for Ocean Shores - over 60 miles west of Olympia.