I get the like button code from https://developers.facebook.com/docs/reference/plugins/like/, and on my page, the like button is rendered correctly...at least it looks like so :P
But when I click on the like button, the comment dialog appear and disappear immediately, and the button becomes a Confirm link; then I click on the like, a popup window ask me to confirm to like it...then, when I back to my page, I can see the comment dialog. But whatever I input, after I clicked on the Post button, the dialog will not close.
In my Chrome console, I see when I click on the Post button, a request is make to https://www.facebook.com/plugins/like/comment
, and the return result is:
for (;;);{"__ar":1,"payload":null}
I compared this behavior on other sites, and it is clear the return is different. But I have no idea why.