I was having problems with my stuff not saving. Achievements, favor points, and my options.
I was looking through, and found http://forums.demigodthegame.com/357516.
Anyways. I went to the location (Document\My Games\Gas Powered Games\Demigod.), and I remember something about Game.prefs.new. I deleted it. (Also, my Game.prefs file is no longer set to read-only.) and now my Achievements, favor points and options save. I'm not sure if the achievements over-time are working. I'll report back later. The favor items are saved as "Purchased", too.
I'm on Vista, by the way. So Games.Prefs.New might not be in XP folders. I'm not really sure. But I hope this helps people.