Graph API returns 'false' or 'Unsupported get request' accessing public Facebook Page

I've been having some problems with a few Fan Pages and getting their details with the Facebook Graph API.

When I try to get the details for the Fan page, Graph API only returned false, but is now returning

{
    "error": {
        "message": "Unsupported get request.",
        "type": "GraphMethodException",
        "code": 100
     }
}

This is not the situation with all Facebook Pages, just for a few.

For example, when I try to get the details for this page at https://graph.facebook.com/CaptainMorganMacedonia, it only returns an error.

The page is public and has more than 25 fans, but I still have problems fetching the details of the page. Is it something with Facebook, or does the page have some bad configuration?