I spent a good few hours trying to get various methods working. It's now 4:27am, and I finally found a working method for GreaseMonkey users [FireFox plugin]
Install GreaseMonkey at: https://addons.mozilla.org/en-US/firefox/addon/748
Install the ImageShack script from http://hibia.fbi.be/imageshack.user.js [Just click that link, GreaseMonkey will do the rest if you accept.]
Congratulations. You are now viewing images through a pre-selected proxy. If you can see the image below, it was a success! Careful, you may have to wait a while.
The frog will load, but then be replaced by the proxied version. If it doesn't appear after about 20 seconds after the whole page has loaded [Done down the bottom in your status bar] then send me an email at hibia@fakku.net, a PM or reply to this thread.