Hi, in game 5199253, towards the end (possibly my very last turn), I had 3 coins in play, 3 debt and 1 buy. I chose to pay my 3 debt. Immediately afterwards my turn ended. So if I had wanted to buy a 0-cost card, I couldn't have. I believe that I am correct that paying debt does not count as a buy?
EDIT: Not sure if this counts as an interface issue, but not sure which other forum it should have gone in.