What does happen when a user loses the Internet connection in the middle of doing something in KanBo?. How much of their work would he lose?

KanBo has been designed to be immediately persistent. Whatever you do like create a card, a comment, a note, you move a card, etc. everything you have done until the loss of connection is stored. So the worst thing that can happen is that you will lose the last action. You can try it out by disconnecting your computer from Wi-Fi or unplugging the network cable - you will see KanBo offline display. KanBo shows you when you are offline and reconnects itself automatically when your Internet connection comes back.