The only problem I have experienced so far has been some ridiculous notion that my character should have to sell my food dirt cheap to the cities of his realm. Aside from that, I have had few problems. My character is only the lord of a food producing region and there is this infernal peace going on so I have yet to experience the full system. All I do is have my character post a bunch of food to sell at his price (He refuses to fill the ridiculously low buy offers posted by the dukes) and then goes about his business. He checks on stores before/during winter as well.
At the same time, I see how even my character's minimal food management requirements might get in the way of a good war. Not too excited about that possibility.
