Fbexternal-a.akamaihd.net/safe_image.php returns a 1x1 image

In my facebook reader application, my photo is sometimes not displayed, due to the fact that fbexternal-a.akamaihd.net/safe_image.php will not display it.

I took the links from JSON below, this corresponded to part of the JSON response.

  "message": "http://www.youtube.com/watch?v=RJer7-eAy3o", 
  "picture": "https://fbexternal-a.akamaihd.net/safe_image.php?d=AQCMr5crfpv0x3lm&w=130&h=130&url=http\u00253A\u00252F\u00252Fi3.ytimg.com\u00252Fvi\u00252FRJer7-eAy3o\u00252Fmqdefault.jpg", 
  "link": "http://www.youtube.com/watch?v=RJer7-eAy3o", 
  "source": "http://www.youtube.com/v/RJer7-eAy3o?version=3&autohide=1&autoplay=1", 
  "name": "Dougie MacLean - Broken Wings", 
  "caption": "www.youtube.com", 
  "description": "Dougie MacLean 'Broken Wings' performed with strings at The Perthshire Amber Festival, October 2005.", 
  "icon": "https://s-static.ak.facebook.com/rsrc.php/v2/yj/r/v2OnaTyTQZE.gif"

The problem is https://fbexternal-a.akamaihd.net/safe_image.php?d=AQCMr5crfpv0x3lm&w=130&h=130&url=http\u00253A\u00252F\u00252Fi3.ytimg.com\u00252Fvi\u00252FRJer7-eAy3o\u00252Fmqdefault.jpgthat

If I visited http://i3.ytimg.com/u00252Fvi/RJer7-eAy3o/mqdefault.jpg, it displays the correct image, so this may not be a problem. Am I doing something wrong or safe_image.phpsimple safe_image.phpand should I just remove the url from the original url and use it?

Tnx and cheers, syak