Alrighty hold on to your hats folks, here's some news on what has been done tonight.

FIXED Island discovery bug (invisible provinces)
FIXED All races converting elites
FIXED Raze in war not destroying land
FIXED Plague wasn't being cured by Nature's Blessing

CHANGED Undead conversion rate was too low, has been increased
CHANGED Undead conversion has been doubled (on top of the increase) for the next two days, to make up for all races able to convert, and the previous low rate

Reports of undead horses not dying, this is intentional not a bug