When Rory and the old man are in the hot house, the old man's left collar button is unbuttoned/buttoned between shots.
The second hand on Rory's watch stops at 40 seconds and does not move when he is drunk in the apartment.
Bradley cooper hugging wife at sink, for a few frames it's the young man in France. Suspenders are clearly seen. Where the snippet comes from is much later in the movie.
When the old man is talking to Rory in the park the camera is showing his right side and he holds a half burned cigarette in his right hand. During the same conversation the old man then brings up a freshly lit cigarette in his left hand.
When Rory and Dora are arguing in the alley outside of the restaurant, Rory's words do not match his lips' movements.
When Rory admits to his editor that he didn't author the novel, his editor's words do not match his lips' movements.
In two different New York scenes we can see trucks from Canada Post.