I started playing around with the new Firestorm strategic spell. I accidentally cast it on the defenders inside a town and then attacked them. I suffered no losses in the battle, but then everyone except one squad was killed automatically after the message that I wiped out the enemy faction. I received the messages that my champion and sovereign were defeated (despite my having 130 hp and 25% fire resistance) but escaped a total of twenty times in a row, with my champion receiving every battle wound in the game. When I saved the game and then reloaded, it killed them a second time immediately after reloading. They are now stuck in the burning town I captured immobilized for 32 turns.
I also cast the firestorm spell on some archers, and they took a little damage when I cast it, then just stood there passing their turn inside the inferno without taking any damage each turn. If I fought them and then entered the burning square, my whole army dies again.
Here is the autosave a few turns before I walked East to the town and started casting Firestorm on enemies, too. The other link is after I got stuck in the burning town.
http://dl.dropbox.com/u/59442120/Elemental/20120128/AutoSave.EleSav
Also, my sovereign is a Wraith I created, but the character description when you view her in game it says race is Altarran?