I’m having the same issue, in the same timeframe. The “Like” button still works however.
In my JavaScript console, I see this error, “Can’t find variable: copy_properties” related to JS library http://connect.facebook.net/en_US/all.js
I get no errors, but the plugin doesn’t output any classes either.
Mine’s fixed now, thank you.
Bump, I’ve got the same thing starting about mid-morning Pacific time.
