I launched my unregistered version of Unison, that I downloaded today and started writing a LONG message. I wanted to try it out. After ten minutes (yes, the message was that long) Unison told me the time limit had expired and the only choices were "Purchase" or "Quit". Clicking "Purchase" quit the app, totally removing my long post that is now forever gone.

While I'm quite ok with developers putting time-limits on their demos - removing my text was totally uncalled for!