I haven't been able to buy anything since the update. Is there something wrong with the shops, or have I missed something? As far as I can tell, I have plenty of coins to buy the items I'm trying to purchase.

I did just arrive in the swamp though (Nettie is the trader I'm trying to buy from), and I could potentially see the currency changing somehow since the keys required for chests changed just before the swamp, but if something like that is going on, it doesn't seem to be communicated anywhere that I've seen.