During the porting of new object power calculations to PWMAngband, I was looking at the differences in the result vs 4.0.5 and discovered the following bug: ac power is directly proportional to ac, which means that a plain iron crown [0,+0] gets a final power of 0. What happens in PWMAngband also happens in 4.0.5: the crown is unsellable.
From what I see in the code, it's just the base armour power (BASE_ARMOUR_POWER = 1) added when ac is positive instead of always added. This could also be fixed in the nightlies.
From what I see in the code, it's just the base armour power (BASE_ARMOUR_POWER = 1) added when ac is positive instead of always added. This could also be fixed in the nightlies.