Hi, from version 2.10.1 I’ve the same problem.
Not in every posts daily upload (about 6/day), but 3-4 posts “Like” button is visible but not works, it flashs but no posting on facebook and counter doesn’t grow.
Upgrading to 2.10.2 and (today) to 2.10.3, the problem still un-resolved.
Tested on any popular browser, osx/win7/win8.
I must repair every single post by debugging with facebook tools, (https://developers.facebook.com/tools/debug).
