Just thought I would add something here. I did a clean install and migrated the apps over and most documents, but not a complete migration. My boot time was the same, if not faster by a wee bit, than with Tiger. Everything runs much faster. I got no pale blue screen, and the boot went from gray screen to log-on screen just about immediately. Last night I did a stupid thing, however. I ran Audio Hijack (never thinking it might not be compatible) and clicked on the "instant hijack" option. I've never done that before. It had to make changes to my log-in, and had to log me off. After it did, I remained at a blue screen, never getting the option to log on. I tried a safe boot with the same result. I booted from the Leopard DVD and repaired permissions, to no avail. I finally used Time Machine for a system restore. That worked, and I'm up and running, but now I do get a blue screen before the log-on screen and boot time is longer. I booted at about 20 seconds before and I'd say it takes at least that to get to the blue screen and then a bit of a wait for the log on screen. I am going to repair permissions again, see if it helps, but I wanted to let you all know that before my episode of blonde, booting was flawless and quick. This long boot and lag-time isn't normal.