I wonder if anyone can shed light on this? Once a week, as a housekeeping task, I run "Repair Permissions". The last several occasions I have done so, I have encountered the same error. It reads: private/etc/cups group 0 should be 26. I have absolutely no idea what this means and, more importantly, why even though ostensibly repaired, it reappears the following time I run Repair Permissions. I'd welcome advice.