Since July 17 the old share button stopped working on all the websites I manage.
I've read reports by other users that are facing similar issues, but I was not able to find anything official.
Do you know if there is any official source available for this?
First they had deprecated the share button in favor of like button,(and though share continued working, as far as I experienced, it was buggy). But it seems, now (November 10, 2013) facebook lunched new share button, and it works fine again
check these links
https://developers.facebook.com/docs/plugins/share-button/
https://developers.facebook.com/blog/post/2013/11/06/introducing-new-like-and-share-buttons/
