Hey all, Unfortunately, right now I'm typing this message from my SuperDuper backup made right before the upgrade to Lion. When I downloaded and upgraded Lion, things went very smoothly. Lion booted up fine, my Mail application upgraded all the messages to the new format, and I upgraded a few utilities. A minute or two of browsing around, and my mouse would no longer respond to clicking. The pointer would move, but it wouldn't bring up the dock (which is set to auto-hide) or respond to any clicks. I had to hard-shutdown my MacBook. When it restarted, after less than five minutes it did the same thing, leading to a full lockup. Until I can figure out what the problem is, I'll be using my backup drive to boot from.