Another one to watch out for, if you save a game, then an update gets pushed out for the game, then you load the updated game and have it load the saved state, you may get some oddities because the old state of the objects is loaded. For example, I saved the game state, then added some new UI components and moved some of the old UI components, did the rebuild and ran the update version, hit my load save game button, and the new UI components still showed, but the old ones jumped back to their old spot which caused a good deal of oddness in the HUD/UI layer. Just one thing to be cognizant of, the old state of objects saved does not take into account new objects which makes perfect sense, but I can also see a lot of designer getting into trouble with pushing game updates to games that support the save state features...