I submitted a few small fixes for Chronicle 2 last week but the update was rejected because it crashed during launch for the testers under iOS 6.0.1. I did some more research and found other developers experiencing the same problem and, from what I can tell, it's an iCloud bug. I haven't been able to reproduce it on any of my test devices and I've talked to existing users that are running just fine under iOS 5.x and 6.x.