I had that problem after reinstalling my system, I managed to solve it with some help from TosaInu. The org picture hosting uses an anti-leeching system and you must have refers enabled to view the screenshots hosted on the org. If refers are disabled you see an org logo instead.

Somewhere on your PC will be an option to enable refers, it could be in your internet security settings, your firewall etc. Once it is enabled all the pictures should show every time. In my case it was Norton personal firewall 2002 causing the problem.

I hope that makes sense, if you need more help I'm sure someone more technically competent can think of something.