CCC will now unmount (with force, if necessary) the Recovery HD associated with the source volume before attempting to create an archive of that volume. This addresses an issue in which various third-party utilities (especially Antivirus software) would dissent an ordinary unmount request, causing the attempt to archive the Recovery HD to fail.
If a backup task was configured to back up the startup disk, but the user had excluded system files from the backup task, CCC would avoid recreating startup caches on the destination. CCC logged this uninteresting non-event, but the logging of that event was causing a crash. That crash occurred at the very end of a usually-successful backup task, but resulted in a task history event not being recorded. We fixed that crasher.
CCC 4.1.8 raises a configuration concern if the destination is a USB device larger than 2TB. This update