First character empty using Ember action on key-press

When using action on input form like this:

  {{input value=firstName action="didType" on="key-press" class="uk-form"}}

and controller like this:

App.IndexController = Ember.ArrayController.extend({
  actions: {
    didType: function(something) {
      console.log("Typed: "+something);

    }
  }
});

key presses work, but the first character is undefined. So if I type: "hello" the following outputs: 'Typed: hell'

Anyone know what's wrong?

Here's the JSBin.