Facebook is blocking all shared links that point to popular image hosting site, Imgur.com. Facebook also removed all previous posts that linked to Imgur according to a few on Twitter. If you try to share an Imgur link, you’ll get a popup layer saying that the content is blocked and has been reported as spam.
If you see this message, you can click the ‘Let us know’ link to be taken to the block appeal form to get Facebook to remove the domain-level block.
(via Reddit)