I've just recently upgraded to Panther (running 10.3.4) on a G4 500 Desktop. Things were working fine for the first 24 hours, and then mysteriously as I began to click different icons, they would disappear, until all 3 drives of the partitioned hard drives vanished. There was nothing left on the screen except the cursor. I restarted several times, and it would boot up normally, ask me to login (it didn't have my user name pre-filled though), and once I logged in, I would again be taken to this empty screen. It's not a solid blue, just one of the default screen patterns. No dock, no icons, just the cursor. I was concerned that my hard drive was dying, so I booted off the OS9 disk, and that works fine. All the drives are still there along with the data. Anyone experienced anything like this before? I tried a few of the suggestions on the Apple site but those didn't help at all. I'm thinking now that my best bet is to reinstall Panther, but I don't want to erase all the set-up I've already done (address books, Calendar, etc.). If I install with the "Archive and Install" option, will that protect what I've done? thanks!