Have had this problem for a while now and am failing at trying to fix it, have also seen others having similar problems but not completely the same as this - any help would be appreciated.
Here's my error message :
The image referenced by the url of og:image tag could not be downloaded.
And this is the page it relates to:
It lists the og:image fine
Meta Tag: <meta property="og:image" content="http://www.sixteeneighteen.co.uk/wp-content/uploads/2013/02/elegance-1024x840.jpg" />
PS. any help for this would be amazing, this is literally just about to break me - I've been trying to fix it for weeks :( and I did post this comment into another question but then realised that that particular question had been resolved already