I recognize this is an old thread, but I had this problem today and was looking here and elsewhere for answers. My response is for people who may be as clueless about their Mac as I am. After nearly losing my mind when I thought I lost my document to the asterisk bug, I figured out that Time Machine, if you have it enabled, automatically backs up all your files every hour for the previous 24 hrs and does daily backups for the past month. I'm not talking about your back-up drive that you connect to Time Machine, which is all that I thought it did. This is separate and internal to the system. Just click on Enter Time Machine, and you can scroll through to find your saved document prior to the bug. Hope this helps somebody and saves you from the unnecessary despair I experienced.