IT'S THE BEST SCRIPT THERE IS.

BUT I'm finding that it never gets the original size. For example this pic:

www.flickr.com/photos/julietbanana/2685579029/

is public, safe and has a highest (original) resolution of 2112 x 2816 that I can't get with the script's link, but I can with the actions thing.

This script has become one of my essential ones when using Flickr.

I especially like the quick links to the different image sizes available without the need to click on the All Sizes icon.