I’m trying to implement the Send button, but running into what may just be a user experience issue but certainly appears to be a bug.
At least on my machine, the same is happening on my site as well as the demo in the link above.
When you click the “To” field to enter a friend’s name and start typing nothing shows up. It doesn’t show the drop down of friends. Then if you click in the “Message” field and go back to the “To” field the drop down works.
Am I alone here?
Though I filed a Facebook bug report there was already an existing ticket. See this ticket for the best updates: https://developers.facebook.com/bugs/263204287096105