Factual error: When Vincent shoots Marvin the bullet goes through Marvin's head and exits out the back of his skull with explosive force - enough to splatter "pieces of brain" all over the back of the car. The rear window of the car should have shattered from the bullet, it doesn't even get chipped.
Factual error: In The Bonnie Situation when the white kid busts out of the bathroom and empties his "canon", there is absolutely no recoil on the weapon. The gun is either a .357 magnum or .44 cal and would have a huge kick after firing. In this scene, he fires all 6 shots with barely any recoil at all.
Factual error: Only in Germany is a McDonald's Quarter Pounder known exactly as a "Royale with Cheese" ("Royal mit Käse"). The closest otherwise is the French or Portugese "Royal Cheese" but Jules specifically mentions Amsterdam, and a Quarter Pounder with Cheese in Holland is just a Quarter Pounder with Cheese. Many countries which use the metric system don't bother renaming products that use imperial measures. It's a Quarter Pounder with Cheese in Australia, too. Vincent's observation about "Royale with Cheese" being the name of the quarter-pounder with cheese in Amsterdam applies - albeit to Germany, where this has been the official name of the burger for 40+ years.