I have been reminded of a painful lesson: don't upgrade too many things at once! Debugging becomes a nightmare. I am having repeated problems where my Finder is freezing (freezing bad, where I have to do a hard re-boot) So is my problem caused by: 1. New RAM (upgraded to 48 GIG) 2. Booting in 64 bit kernel (required to see more than 32 GIGs) 3. New OWC RAID enclosure 4. New PCI Seritek SATA Card 5. New Drives in RAID 6. OS 10.6.7 7. New backup drives for Time Machine 8. None of the above! At first I thought my problems must be booting in 64 bit kernel...but then my finder froze while in 32 bit mode. A short 15 minute test on the RAM indicates no problems. I'll run Disk Warrior and TechTool Pro but first priority is fresh backups. Geesh. This is crazy.