I opened up Omnifocus this morning to make sure I had everything I need for errands today, only to find it as if I was opening it for the first time, with the Intro tasks & projects, and none of my own information.

Semi-fortunately, it reverted to backup without a problem, so I only lost the 2-3 hours I put in last night, organizing projects and tasks and entering date information for everything.

I guess I should backup after any significant session, eh?