Around 00:49:29, the dog is brown. On the next shot, the dog is beige (and from another race).
In one scene under a kite, a stunt playing Charles Bosquier has bare feet, in other scenes he has shoes.
Around 00:35:30, Gérard is saying something but his lips clearly tell something else.
The wedding ceremony supposedly takes place in Gretna Green, Scotland. However, it appears the scenes were actually filmed in France: Many cars in the parking lot are French or Italian cars, and the "Gretna Green to Blacksmith area" coach (on which they land the plane) is a LHD bus made by french lorry- & bus builder Berliet.