Sorry if I was supposed to post this elsewhere or if its been answered but ive had this problem since 1.01 where a faction gets into the 50s then chrashes but now since I have had 1.02 it has chrashed with 5 factions I have played with so far and they are as follows;

Slannish Followers
Khorne Followers
Reikland
Dwarves
Slyvania

If their is already a fix that im unaware of then please leave a reply and close this thread.