Crashed during unit design in mid to late game...first time I was designing a unit with 3B (was relying on summoned units). Wonder of wonders I actually got a zip file out of it

Zip file

update: Appears to happen if I select a full suit of armor and then a component piece afterwards (i.e. greaves, shield, armlets)...helmets and weapons are ok, just anything that might conflict with a 'full suit' of armor. I was using the full suit of masterwork plate...did not really try other full outfits of armor.