not recognize that a file has already been backed up?
I'm using (the new) Windows backup [Editor's Note: Why break the old backup routine and not even provide a way to get data from the old backup files?] and doing a weekly incremental backup, which is supposed to backup only the files that have changed since the last backup.
However, I notice that all my backups are over 8Gigabytes, and I know I don't use that much space in a week. I dig into the backup directories and see that -- each week -- the "incremental" backup is including a 5.5Gigabyte file that hasn't changed in months!