[dnanian]

We don't install anything funny, Bob, and we're just an application with no low-level or driver components, so I can't see how SuperDuper! could be causing this problem. We don't even write anything other than our preferences and logs to the source drive.

Try restarting the machine (again, I know) to see if things clear up. If not, perhaps it's something like Spotlight indexing the backup drive and causing issues?