Someone else recently posted the same problem in the image hosting forum, and when I looked at their listing, i experienced the same 'stuck on showing image loading' problem. So, it's not just you.
My suggestion would be to open a support ticket. Up in the top right corner of the page, there's a small, green box/bar that says "Help | Community | Refer a Friend". If you click "Help" and scroll all the way down to bottom of the page that loads, you'll see two links: one for opening a support ticket and one for checking the status of the support ticket you opened.
Best of luck, hopefully the guys will get it fixed up for you straight away (theyre usually pretty good about that)