YourSite is currently using the following deprecated features: Non-threaded…

I am wondering the same thing myself. I don’t want to enable the upgrade until I know if htis plugin will work. But regardless these “breaking changes” will take effect July 10 whether we want them or not.

I will post back here if I find anything useful on the topic.

I updated my Facebook app settings to ‘migration compliant’ (or something like that). It seems to be working fine.