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 banner. Does any person have any ideas to fix this problem?
Did you de-bug the page after making changes to it? You can de-bug it here: https://developers.facebook.com/tools/debug/ The debugger should fetch your new image.