og:image empty

Hello,

I’m having issues with ngfb. Some of my posts show the meta property og:image correctly, but in some others the plug in detect pictures correctly and then adds an extra meta property og:image with empty content.

The empty content doesn’t like to facebook and it shows error. In the ngfb debugger info I can see an empty cell in the og:image array, but I can’t find the source of the problem.

Can you help me? Do you need anything else?

Thanks!

http://wordpress.org/plugins/nextgen-facebook/