That's the news part - I'm not talking about deleting the ubiquity container. Ever since iOS5, and even in iOS6, my experience - and the experience of every developer I've ever run into using CDIS - is that deleting a container via Settings -> iCloud -> Manage -> {appname} -> Delete All results in a permanent breakage.

I'm not calling you a liar - I'm quite confident it works fine for you, but I'm wondering how our experiences can be so different. This isn't just me, this is literally confirmed by entire room fulls of people who've been wrestling CDIS for months.

I'm baffled.

Just to chime in: I use this all the time in testing, and it's never failed on me. You have to do the right thing in your app to watch for these changes and gracefully reset and all, but I've nuked the container (from Settings->iCloud, on Mac and iOS) dozens of times now and never had permanent breakage of any kind.

Occasionally, after doing this, it'll appear to take much longer to provision a new ubiquity store (sometimes minutes, which is unacceptable), but never actually broken.

It's not just me. You can go through a lot of the threads on devforums.apple.com, in the iCloud section, and you'll hear the same thing. The solution to almost all problems is using the Delete All hammer. It's just an unpleasant solution, but definitely fixes the problem and lets you start fresh.