When in the car with his daughter, Raymonde leans over and locks the passenger door, but seconds later the button is no longer pushed down.
When Saskia tosses the Frisbee to Rex at the rest stop, there is a blonde woman wearing pink shorts lying on a blanket on the grass in the background. She gets up and folds the blanket, then puts it in her bag and starts to leave as Saskia and Rex are shown sitting on the ground. When the scene cuts to a close-up of them smoking, the blonde is on her blanket again, gets up, folds it and leaves again.
In the flashback near the end of the film when Raymond is talking to the old man near the coffee machine, the old man says he broke a bone in 1940 when he was eleven years old. Raymond states he then must be 59 years old in November, This makes that year 1988. But, at the beginning of the film when Rex is looking for Saskia you can hear the radio announcer talking about the Tour de France race that is happening and he says it is 1984.
After the discussion with Lieneke and her departure, Rex sits in front of the computer and a mic is visible in the lower left corner.
Raymond tells Rex that when he was a teenager, he jumped from a balcony and lost two of his fingers. However, the adult Raymond clearly has all 10 fingers for the duration of the movie. (It's possible Raymond is exaggerating, or meant that he lost the use of two fingers.)