Well, I guess I spoke too soon about not having any trouble with PT8. As I learned from Sweetwater tech support today, PT8 does not like to deal with USB drives. So transferring a .wav file from a jump drive can make your computer six kinds of crazy. I managed to get PT working with the CS3 update. But now I have an interesting problem. The computer does not recognize either of my internal SATA drives - i.e. my audio drive and backup drive #1. (Back drive #2 is external but I don't write to it as often.) How do I get the computer to wake up and smell the drives? I already trashed prefs, etc. in Protools. UPDATE: It now looks like my problem was a "Bricked" Seagate Barracuda 7200.11 drive with SD15 firmware. If you have Seagate drives, I would recommend checking for firmware updates.