Asterisk moves on task edit, recreating checkbox
Because labels always float to the front of a task's name when you edit it, the asterisk also moves behind them, so when you save the task it returns the checkbox and puts the asterisk in the name of the task.
Here's a video showing it: http://chir.me/1g0MHUW
I remember reading somewhere that the asterisk is not going to be officially supported -- is this true? It's a very useful feature and one I'd be very sad to see go.