The user Not found appears on top of the list of users with quotas and is followed by what appears to a UID
in One volume i have 2 such entries and on another i have 4 entries ( of several hundred users )

My gut instinkt tells me this is uids referring to user objects that no longer exist - and can be removed from the list, I am just wondering How this can occur. any user object delete operation should also clear the quota "acl" accociated with the volume.

Can anyone offer an explenation ?