The comment count disappeared in the teaser view for new nodes although it is enabled in the settings.

On older posts the response from https://graph.facebook.com/?ids=THEURL

was

{
   "THEURL": {
      "id": "THEURL",
      "shares": 106,
      "comments": 55
   }
} 

now it turned to:

{
   "THEURL": {
      "url": "THEURL",
      "type": "article",
      "title": "Title of the article",
      "image": [
         {
            "url": "Url to Image"
         }
      ],
      "description": "blabla",
      "site_name": "Our Site Name",
      "updated_time": "2013-01-20T03:55:33+0000",
      "id": "457728547623597",
      "application": {
         "id": "111686885612669",
         "name": "Comments",
         "url": "https://www.facebook.com/apps/application.php?id=111686885612669"
      }
   }
}

and maybe that's why the comment count can't be showed anymore?

I didn't change anything on Facebook's site so did anybody else experience the same issue?