Facebook cannot displayed the Og-image properly

I have been posting for a client on its fan page. The client prepares a blog article and mark-up the meta og-image tag, then it published on the WordPress company. Then the client transfers the url of the blog article. Then I write a few line on the Facebook editor and then a post with a feature image appears on the page. However, with the updated of the Facebook publishing tool, many of my recent posts couldn't show the feature image, but a default ugly picture, company logo + a text…

Facebook cannot displayed the Og-image properly