Hola -
 
Been playing a Large map with 3 opponents.  Game r ran ather somewhat smoothly (other than a battlefield bug and a the unable to end turn auto-explore bug).
 
I got to turn 350ish, and the game starts CTDing.  It seems to happen right  after a battle, but I've been unable to recreate the precise cause.  I am using a custom Kingdom and a custom sovereign.
 
Crash file:
 
http://pastebin.ca/1938645