I always find it strange when OS updates affect apps in this way. It just shouldn't happen. It reminds me of when Linus preaches that "the kernel should never break userspace". Why would a OS update suddenly cause the Mail app -- developed by the same company as the OS, for what it's worth -- to have these strange (and catastrophic) data syncing issues? And, just to add, I am tired of OS updates updating and/or relea…
This happens to iOS: every time there's a new major version coming, the layout of many apps breaks for some reason and elements move all over the place. I wonder why.
I had some apps break and need update after an iOS update, but not layout problems in apps... at least not in the 50+ non-Apple apps I use...