I just upgraded to 2009 and am not happy at all about the new consolidation approach compared to the backup destinations in version 11. What puzzles me as well is how consolidation works with differential backups: Imagine you define a task which backups differentially and consolidates after 10 backups. You will get a full backup we call "f1" and 10 differential backups "d2" to "d10". Each differential backup stores only the differences compared to backup "f1". Now you make one more backup which will lead to the consolidation of "f1" and "d2" into something new which we might call "f2". What puzzles me now that all differential backups "d3" to "d10" are still differential backups compared to "f1" and not to the newly consolidated backup "f2". The manual (at least the German version) says nothing here... Any ideas?