Howdy! I recently did an upgrade from 10.5.6 to 10.5.7. I had the original Leopard DVD in the drive, as I was doing some troubleshooting a few days prior. The upgrade went through fine, but then I noticed, I could not make any changes in the 'Disk Utility'. I tried to fix it in the 'System Preferences' - no luck. Soon I discovered I could not make any changes where an 'admin' login was required. Furthermore, all user accounts have been set to 'standard'. There are no options for an admin to login????? Does anyone have a clue as to what is happening, and more importantly, how to fix it?