One of the most exciting things for me about the new OmniOutliner 3 is its auto-save capability. This is a feature that is configurable in the preferences (defaults to saving every 5 minutes).

Unfortunately, I just discovered that rather than backing up into a separate folder, auto-saves are actually committed directly to the outline files. This means that files that haven’t been saved at all (say the 20 untitled outlines I had open) won’t be around after your power mishap.

FYI.