Question

I know that according to http://developers.facebook.com/bugs/311146672312127 it is impossible to retrieve attachments using Open Graph API. What about FQL?

SELECT attachment FROM message
WHERE thread_id = xxxxxxxxxxxxxxx AND viewer_id=xxxxxxxxxx LIMIT 925,1

Gives me:

{
  "data": [
    {
      "attachment": {
        "media": [
        ], 
        "name": "", 
        "caption": "", 
        "description": "", 
        "properties": [
        ], 
        "icon": "http://static.ak.fbcdn.net/rsrc.php/v2/yD/r/aS8ecmYRys0.gif", 
        "fb_object_type": "", 
        "fb_object_id": "", 
        "tagged_ids": [
        ]
      }
    }
  ]
}

Answer 1

It seems to be unsupported yet. You can use this:

View attachments in threads

It will be supperted in unified_message, I guess.