The symbols are right under the gem, so I have a feeling the three symbols are for a potions for making your villagers climb or float or something. Just a hunch though... I had a potions that made them hiccup bubbles that floated up. Weird... Also I had the blannesamagawa thing happen to me too... one of my villagers is permanently retarded . Though, I found a fertility potion and healing potion and that was cool.