If that is the build I'm using now, I am afraid the Notifications area is no longer really that usable with a screen-reader. In the Notifications list, it will tell you that someone has liked a post, but it no longer says what the post is. So you've no idea about the content people are engaging in.

Thank you for fixing screen-reader issues. I was managing fine without the improvements but obviously they are welcome.

That's the kind of food we like.

That would be me!