Hm. I have moved the server recently, but I cannot reproduce the error. They are showing up for me.
May I ask where you live (country), what operating system and what browser you use?

Also I think you might be using a proxy. I have implemented hotlink protection since my Images get used on other websites a lot causing me a lot of bandwidth problems. If you let me know what proxy (if any) you use, I can allow it to access the images.
Thanks