random ctd all the time

[DrwHem]

I dont recall ever having this problem before now and i have played ffh on vista before. all my previous games were randomly generated maps but i wanted to make a more interesting map so i made a huge flat world with two continents and one small uninhabited continent in the middle. the game runs fine up until turn 800 or so when it starts to ctd right at the beginning of one of my turns. ive already installed the updated direct x files. it just randomly crashes. sometimes i reload it and its fine...other times it crashes. its making this game unplayable and ive posted in the bug thread and no one has looked at it.