Using Chrome 21.0.1180.79 m & Win7
Use the Spam Cleaner on a account known to have 2 others with the same IP. After using the Spam Cleaner on the first you receive a popup showing the other 2, hitting the "Spam" next to the one of the others causes the popup to reload. Try clicking on the second "Spam" link and the popup disappears and then no links on the page are clickable. If you check the final account you clicked it will be as normal with no Spam Cleaner ran against it.