CTDs in Iberia

[Aemilius Paulus]

Every time I start a battle in Iberia, there is a 50/50 chance the game will crash during the loading process. This is pretty much the only time I ever get CTDs during the game (I am playing v1.1). What makes Iberia so special? BTW, I am playing Romani, if that makes any difference.

EDIT: It isn't such a big problem for me, I usually start the game again and reload, but CTDs, as I have already said, I just wonder why this happens only in Iberia.