So, before installing the PB, I backed up to TM. I had Filevault enabled under Mavericks and decied to disable under the Yosemite PB. After a month of decrypting, I gave up and restored to Mavericks...and noticed Filevault is now disabled. I was going to wait for the official Yosemite release but was unable to access my iTunes library since I updated to iTunes 12.... So I reinstalled Yosemite. I have to say, I HATED Mavericks after being on Yosemite for over a month. One of the reasons? the CONSTANT "enter XXXXXX.com password" message for mail. Overall, Yosemite is waaaay more enjoyable than mavericks. Mavericks seems aniquated in a way.