(Not Game breaking but no other keywords are relevant) The prices are displayed wrong for some items.
Carrot Seet displays: 3 cupules actual price: 1 cupule
Cabbage Seed displays: 10 c actual price: 2 c
Cherry Sapling displays: 30 c actual price: 50 c

Also with SunnySeed, the shipping prices are doubling up. They are being applied in the shipping fee (correct) but also to the item purchase price (incorrect). So the next day ends up charging 100 c and economy charges 20 c.