Ask HN: Has Facebook turned off email notifications?

I am not a big Facebook user -- I rely on their email notifications feature so that I'm aware when someone sends me a message or event invitation.

Apparently sometime in the last few weeks, I stopped receiving email notifications of any kind.

(I checked the settings page for email notification; it was very cryptic and basically useless.)

Has anyone else experienced this? Is there any way to reenable it?