Okay, I re-did the image shuffling code to better suit the absence of the Show'em button. It should also be quicker and require fewer contacts with the server.
One bit of weirdness, in IE if you change a bunch of checkboxes very rapidly, the key legend can get corrupted (multithreading fun: it isn't doing the legend updates in the correct order). Let me know how serious of a problem you consider it.
This one.