I changed a URL within one of my add-ons, and since most of my action on the development site IS strictly in the ACP, I actually don't have a cookie located there. So, I'm not logged in. However, in Apple's smart ways, they chose to make the URL bar "smart" and constantly go back to the old URL (admin.php?gallery-categories/). Since I'm not logged in, I get a badly formatted page saying that the controller doesn't define action . (which should specify controller doesn't exist or something more useful in my opinion). I know, extremely minor, but shouldn't it check for login state, then start to figure out actions and such?