I noticed a ton of updates kill user data -- is this just an unfortunate side effect of updating that can't be overcome? I can understand if the game is updated in such a way that the old data isn't really relevant, or keeping the old data / scores doesn't make sense because the scoring can't be compared to the new version. However, I'd try everything I could to preserve my user's data at all costs, which leads me to believe that this loss of data is not the developer's fault. Does anyone have any insight? The latest example I've heard of is Zombieville USA, which apparently erases the scores / records after the update.