Answer by Hupfauer for How can I share an image on Facebook using FB.ui feed dialog?

You must remove the source parameter.

The request you should provide:

    FB.ui(        {            method: 'feed',            name: 'Come Listen to this Song',            link: url_base +'/listen',            picture: self._song.share_img,            caption: 'mywebsite.com',            description: msg,            message: msg        },

Summary

Click on this image to try it in Graph ExplorerImage may be NSFW.
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Here you go with the result in Facebook:

Image may be NSFW.
Clik here to view.