I replied to your cross-post on OSX. I won’t repeat it all, but basically it was that CCC sets r/o attributes on the copy (or at least it did it to me). An easy fix in Finder (hit ‘info’), but I’ve switched to Intech’s Quickback. (Buy a ADS firewire drive for $60 and you get the $80 set of apps free.) Your problem is not quite that, but I’d check the attributes just in case. Might be cascading error messages.