The most annoying non-game breaking bug..

EVER

EVERRRRR

If you forget to do this, or play in short bursts like me, this is beyond frustrating!

It's just like.. how? HOW did they let something so obvious like this slip by? It's the whole reason that so many people though merchants were so useless. It didn't seem useful to have a merchant making 20 gold on something in africa.. untill you changed your capital and realized the equation is bugged and needs to be reset in that method.