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Rage Uses Per Day for Barbarian, Berserker Calculated Wrong...
Description says "once per day per four levels, starts at level 1 with one use". An additional use should then be obtained at levels 4 and 8. Instead, you obtain the additional use at level 5 and (I'm assuming) 9. If I remember correctly, the original games calculated it as a use at level 1, and then 4, 8, 12, etc, and this is how they were calculated on through Neverwinter Nights (this goes for all use-per-day abilities for all classes).
I don't know if other use-per-day abilities with other classes are being incorrectly calculated the same way.
Interestingly, the Dwarven Defender's Defensive Stance use per day is correct.