Early in the movie when they are driving down the road, Gertie is not seen in the back seat. Next shot she's on the back passenger side seat.
Before Chubby leaves the office, he is wearing a single-breasted jacket, but when he goes down to the car, it's a double-breasted jacket and Fluffy tears it up. Later, when the guys stop to eat, Chubby is wearing the single-breasted jacket again.