Problem with Firefox

My problem is when I go to www.wincustomize.com I can't see the small images, like when i go in section DesktopX Themes, I can't see pictures of desktopX themes, so i download like a blind man and hope that i downloaded the right thing. It's really getting on my nerves, so is there any1 here that can help me.
Like I said my browser is Firefox, but I used Opera too, and it's the same problem, so I think that Firefox is not main problem maker here.
Tnx on your useful answers...