What’s in it?
Nobody knows – Apple didn’t bother with release notes for this 1.75GB monster. Allegedly, there aren’t even release notes inside the download itself.
What apps will it break?
Nobody knows – Apple didn’t allow developers to test it before they put it live.
What does Apple have to say about it?
I don’t know – the official developer site has zero coverage other than the download link itself and a short note to say it is “mandatory” and that it might break your phone if wrongly installed.
More to come once I’ve got it working…