Do you have a unit that is not what it appears to be?

I had 2 units that 'became' something else. One of them was a 'captain' (but the potrait was a family member, the other was a feudal knight (but had the potrait of a peasant).

Whenever i engage them in a fight, the computer crashes to desktop (CTD). Whenever i move them into a city, CTDs happens.

Maybe you have such units too, and they are in a queue to move into city or perform some other action? For me, i disbanded one, and hope the other dies of old age after moving him to a corner of the world. (hopefully, there wouldn't be CTD when that happens..)