This issue is happening on the latest version 1.5 of Q2A, however this solution does not work since there is no qa-share-layer.php any longer. This has been updated to qa-plugin/facebook-login/qa-facebook-login.php and within is the code xfbml: true, I tried changing this to false but it then the fblogin button disappeared. I also tried to remove the tag completely but had the same result.