The amount of salt on the margarita glass that Carrie takes from the server changes between scenes.
At 35:21, both Carrie and Matt's glasses are empty. At 35:25, Carrie is sipping from her glass and at 35:29, it is revealed that Matt's empty glass has been exchanged with a tall glass of iced Diet Coke.
At 56:42, Matt calls Carrie Pollyanna. It seems like the scene had been cut from the first date conversation where Carrie corrected her name from Gloria Patch to Pollyanna.
At 35:21, there are 3 glasses on the table left to Carrie. At 35:22, there are 4.
The book she gets back is not a first edition of Franny and Zooey. The first edition is solid dark gray cloth; The one she gets back is off-white with a green spine. It is also taller and wider than the book in any edition.