SuperDuper error message

[badlydrawnboy]

Dave,

I was able to unmount the original drive by renaming it and booting from an external HD. I ran Disk Utility on the original drive, but no repairs were necessary. I then ran Disk Warrior and some minor changes were made to the directory. Then I restarted to the Sandbox.

At this point, I again tried restarting to the OSX DVD. And again, I got a kernel panic. This doesn't make any sense to me. The original drive appears to be fine, the Sandbox appears to be fine, but I can't start-up from the DVD.

I suppose I'll have to call Apple.

In the meantime, at the beginning of this post you cautioned me NOT to repair permissions on the original drive using Disk Utility. Why is that? I've been doing that routinely as part of my system maintenance (every two weeks or so I restart from an external HD and repair permissions on both the Sandbox and original HD using Disk Utility). Is this a bad idea?

Thanks,
Chris