Hi Martin,
The Errata says: Page 24: 1.5 Hitting the enemy: Change last paragraph to read “Inferior Fighters hit all but other Inferior Fighters on a throw of five. Units armed with bows, longbows or crossbows and no named melee weapon are Inferior Fighters unless otherwise indicated to be Superior Fighters by their army list”.
The QRF has not been updated to reflect this.
Regards