Hi again,
Just a quick comment.
I have several different volumes that I back-up to, and I rarely back-up to the same volume twice in a row. So, basically each time I open SD it is looking for the volume that it backed-up to most recently. When it can't find it, it gives the "cannot find target volume" message.
It's a minor issue and it's not really a big deal for me to dismiss the dialog, but it might be worth considering adding a option/preference setting to avoid this behavior.
SuperDuper! is great
-Timothy