like the button not displayed

Sure we can help. Can you post a link to a page where the Like button is missing and should be? That will help us understand where the problem is. You can Private Message it to me if you'd prefer your URL not to be public.

Thanks,
Alex

Alez,
That's very, very strange. The Like button code is being properly put on the page and is even calling Facebook as expected. However, Facebook's simply returning a blank area to display. This isn't specific to JFBConnect even. If you put the URL of any of your articles into their Like Button test tool, below, you'll see it won't work there either:
developers.facebook.com/docs/reference/plugins/like/

The only thing I see that's a little odd on your site is that the Open Graph "type" property is set to "website" on every page. Did you set a default value for this in the Social Configuration -> Open Graph tab of JFBConnect? If so, can you remove that default so that JFBConnect will properly set the type tag for each page of your site? Once you do that, let me know, and we can test a little more.

Nothing in the 4.2.4 (or any 4.2.x release) should have changed that behavior, so it seems like Facebook may have made a change that coincided with our release. We'll do what we can to help you figure it out though!

Thanks,
Alex

It's very strange, and not something we've seen. If I use the URL Debug Tool from Facebook, the page comes up with no details. Facebook seems to be able to scan the page, but doesn't want to pull in any information about it:
developers.facebook.com/tools/debug

Just try your article URLs and you'll see, and then try www.sourcecoast.com to see what our pages look like. The only other odd thing I see about your tags is that your site_name parameter is also blank. JFBConnect will pull your site name from your Joomla config and use it, but it seems to be blank for you. Can you either set a Site Title in the Global Config area or add a default to JFBConnect, like:
site_name=Name of your Site

Let me know when that's done, and we can test some more. Sorry to not have a good answer, just never seen this issue!

Thanks,
Alex

I'm not sure what you mean with:

I have tried to disable it after debugging open graph reappears

Have you ever seen the Open Graph information about your pages when using the URL Debugger from Facebook? We haven't, so if you have, we'd like to know what you did to make it appear.

Anyways, I really don't think it's something with your site or Joomla in general. It seems like Facebook is, for some reason, not allowing the Like button for your page. As mentioned above, if you use the Facebook Like test tool, you'll see the Like button doesn't appear there either:
[url=https://developers.facebook.com/docs/reference/plugins/like/[/url]Facebook Like Tester[/url]

Can you try disabling the Open Graph integration of JFBConnect altogether and use the Debug Tool again to see what appears? That would help eliminate Open Graph tags as the problem.

We're still looking for possible causes, but this may be something you need to contact Facebook about with a bug report. It's very strange, and simply something we haven't seen before.

Thanks, and sorry for the troubles,
Alex