Hi All, I believe my Time Machine backups is corrupted somewhat after a clean installation. Sometimes it would show up on the finder sidebar, sometimes it doesn't. When I enter into Time Machine mode, most of the time I can only go back to yesterday's backup, which is right after Mountain Lion installed. A couple times I was able to go back all the way to Sept, 2011, which is right about the time I bought the new MBA. And now, I get an error message entering the Time Machine mode. It's always a pain fixing TM/TC related issue. I believe the backups file is still good...I might just need to put it to a new spunbundle(sp?) file? Does anyone know how to do this? I do have an external USB Hard Drive...if that helps.