It's been fixed as of 9:40 AM MST.
While I understand the new "action" requirement, Facebook made a mistake originally forcing people to switch instead of accepting legacy widgets.
They caught their mistake and now you can leave your widgets as they were. New widgets will have the "action" section but I believe it is still (and was supposed to be) optional.
Just remember, if anything you have from Facebook breaks (recommend boxes, like buttons, FB logins), and you haven't touched it... Just let it sit for a few hours and Facebook will finally fix it.
They have had issues like this multiple times in the past. It's very frustrating.