Grossly, insanely different PD strengths

[llamabeast]

Well, that's hardly a serious bug, it's just as if the game had an entirely reasonable alternative rule. It's just unfortunate that the manual doesn't match up with the implementation.

[Sombre]

I think in a game called Dominions a major dominion mechanic not working properly is pretty serious. Far more serious than a spell or unit not working. But you're right, you can still play the game. I suppose it doesn't quality as a must fix in that respect.

Another fairly big one, but not major, would be cave provinces not casting darkness.