ionicPopup buttons hidden in version rc4

i am trying to display a very simple popup but the buttons dont show up. They have ng-hide class by default? Im using version rc4. Is this a known bug or is there a fix? Thanks.

my popup code is:

var myPopup = ${
      template: 'Hello popup',
      title: 'Popup',
      buttons: [
        { text: 'Cancel' },
          text: '<b>Save</b>',
          onTap: function (e) {