Desktop sharing not working in Lubuntu 14.04

On my recently-upgraded to 14.04 Lubuntu machine, desktop sharing didn't work.

Here's how I made it work:

Once (to allow some Windows clients to connect without encryption):

gsettings set org.gnome.Vino require-encryption false

Then every time I want to share my desktop:

/usr/lib/vino/vino-server

and leave that running while I'm sharing.