Early in the upgrade progress bar, where it says: "Configuring Installation", with less than 3 or 4mm of progress on the progress bar (18" screen, 1280x1024), it just hangs. It sits there and does nothing more. Both on my PowerMac G5 and my brand new Mac mini. If I wait for forever, and then power down, and restart, it starts right back up in to 10.5.5, and software update will tell me it wants to install 10.5.6. Anyone seeing anything like this? Know how to work around it?