When Franck steals the painting from Simon in the beginning, he is not wearing gloves. He continues not wearing gloves until he jumps into the yellow plastic tube from the roof. Suddenly he emerges in the dumpster wearing gloves.
Simon shot the revolver using one bullet. So there must be five more bullets left in the revolver since normally only six bullets in a revolver. But we can hear he shot another eight more shots from his revolver to the burning car without ever reloading.
Diesel will not ignite when a heat source is applied, like a gunshot causing a spark.
The view of Auvers by Paul Cezanne in the room of lost or stolen paintings is actually in the Art Institute of Chicago. It was a different painting by him with the same title that was stolen from the Ashmolean Museum, Oxford, UK on December 31 1999.
Simon ties Franck's wrist to the Alfa Romeo's steering wheel telling him to drive. Having your hand tied to the wheel would make driving very awkward if not impossible.
At the auction they call the painter Francesco de Goya. His name was Francisco de Goya.
(at around 15 mins) Franck talks to Simon's surgeon about his treatment. A doctor is bound by confidentiality and would not freely discuss either diagnosis or treatment with a 3rd party.