After doing an upgrade install of Leopard on my Powerbook G4, all of my accounts lost administrator access. A google search sent me to MacRumors (should have searched here first), and the MacRumors post sent me here, which solved my problem. My question, though, is how is this not a security issue? Should it scare me that anyone with an OSX install disk can get root access to my machine? What good is having a password, then?