Aujourd'hui, Dinnerbone a trouvé pourquoi les flèches rebondissent parfois, et a corrigé ça (mais pour une future version).
"Just figured out why sometimes arrows just... bounced... when shot, & why it only happened rarely during some games. It was a stupid reason.
If the players entity ID is 0, the movement netcode (oldest untouched code in the game) will just not send arrow momentum. Huh. Fixed now!"