On my machine, there are 3 things wrong with the attached save game.
1: Next to the city of Polapel, stand the old king & his two brats. They were there when I conquered it, and have been standing there ever since. Right after I took the place I tried to attack him but it wouldn't let me -- thats the issue. Looks like it thinks they are in my city or something. (In case it matters, Polapel had been taken by another faction recently, then I took it from the other faction). The kids grew up while daddy was standing there.
2: In the city of Nestimm, which I just took this turn, a hero named Cuenessa is stacked with my army, but she isn't mine. When I try to talk to her (hoping to recruit her) I end up in negotiations with the hostile king. Exiting & reloading did not help.
3: Manual battles seem to be disabled. Auto only, no matter how many units on each side, even though my threshold is "0". It happened earlier, toggling the threshold between 0 & 1 didn't help. Exiting and reloading helped for one or two combats, but now it is back.
save game at http://dl.dropbox.com/u/8928343/QuickSave-2010-08-A.EleSav
debug.err at http://dl.dropbox.com/u/8928343/debug-2010-08-a.err just after capturing Nestim
debug.err http://pastebin.ca/1913305 just after reloading the save-game
(no crash zip file, because it didn't crash)
xp sp3, 32-bit, 3gb ram, ati 5670 515mb with current drivers. And no, it doesn't seem like the famed out-of-memory error. I've never gotten one of those, and Elemental's mem usage never gets more than about 1gb. CPU seems suspicious though, about 50% even when nothing is happening.