This is so damn confusing.. Two of our sites got updated to 4.2.1 automatically, while the other 30+ sites got updated to 4.1.4. I was hesitant to update to 4.2 because of all the bugs being reported, and sure enough, our two 4.2.1 sites are exhibiting some of these same issues. :(

I've been using WP for 10+ years, so I'm not exactly new to this, but this was by far the most confusing set of updates I can remember, with limited info out there on what exactly was going on. This post was a huge help in figuring things out, so thanks!