Goofs

When Don speaks with the receptionist at Dr Markowski's office, the angle of the laptop relative to the table changes repeatedly between shots.

The blue rental car that Murray drives to the farmhouse has different style wheels than the car that Murray wakes up in after being beat up.

Around the 1hr mark of the film, after Don gets off the plane and is driving over the bridge, his sunglasses appear on, then the camera angle changes and the sunglasses are off, then on again at the next camera angle change, with no indication that he had taken them off

While they're having dinner, Johnston spears several carrots on his fork, nudging one off the edge of the plate and onto the table. In the next shot, it's gone.

Early in the film, on day 1 of Don's trip, there's a shot of him from the backseat looking at a map wearing the light blue shirt he wears on day 3 of his trip.

The text on the book jackets of some of the books Carmen has written have no apostrophes for possessive nouns, such as the incorrect "Carmens" rather than the correct "Carmen's."

As can be evidenced by the symbols on the airport signs (the letters A, B, and C, individually, are in the center of rounded triangles, designating sections of the airport) Newark Airport (NJ) was used for each of the airport scenes, although Murray's character was supposedly going to many different places in the US.

In all of the driving scenes, the windshield sticker is always from New Jersey - even though he's flying between locations.