When going to the set up pages for all the Social Plugins, they now provide example code using an APP ID.

http://developers.facebook.com/docs/plugins/

Is an APP ID now required for the Like Button and other plugins? What happens if an APP ID is not included when using the plugins?

I've checked the Facebook developer blog and read about the Like Button Migration. I haven't been able to find a straight answer for this either there or in the FB Like Reference.

facebook button plugins facebook-like
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