[Firefox Users]

[tonic]

Here is a addon for saving "protected" images:
Backgroundimage Saver
https: // addons.mozilla dot org/en-US/firefox/addon/1853/
but you need to modify it like this:
http: // kb.mozillazine dot org/Editing_an_add-on_to_change_its_compatibility

or you can download a pre modified at:
http: // www dot databus dot dk/firefox/extensions/tweaks/backgroundimage_saver-0.1.5-fx.xpi