For interested parties. Solution of my (and maybe similar problems) was to check headers of oembed feed. I didn’t notice that my headers where little different that in RFC 🙂 Fixing them helped me with my problem.
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This reply was modified 9 years, 2 months ago by zagroda.
Can you tell me what files where empty? I did install both versions of this plugin in wordpress 3.5.2, via wordpress and git. And in both case I have the same error, Call to undefined function the_field().