I wanted to start my own faction, so I ambushed a caravan > my clan started war with Khuzanits > I conquered town Tyal > started my own faction. When I declared Peace, my faction have a peace, but my clan still was in war. After than, I am unable to accept any quest from villages, whose are in ownership by Khuzanits (I did not try people from town or lords so far). Mayve there are more problems, but I did not found them so far.