Jean Claude,
That's actually a bug that will be fixed in the next release that I forgot about. Currently, we'll insert even a blank app_id for the Open Graph tags. To fix, you'll need to edit the /libraries/sourcecoast/opengraph.php file. Around line 95, you'll see:
if (strpos($headerGraphString, 'fb:app_id') === false && SCSocialUtilities::areJFBConnectTagsEnabled())
{
$appId = SCSocialUtilities::getJFBConnectAppId();
$headerGraphString .= '<meta property="fb:app_id" content="' . $appId . '"/>' . CARRIAGE_RETURN;
}Update that with the if ($appId != '') check, as below:
if (strpos($headerGraphString, 'fb:app_id') === false && SCSocialUtilities::areJFBConnectTagsEnabled())
{
$appId = SCSocialUtilities::getJFBConnectAppId();
if($appId != '')
$headerGraphString .= '<meta property="fb:app_id" content="' . $appId . '"/>' . CARRIAGE_RETURN;
}Hope that helps!
Alex