message: Wait until password confirm is non-empty
  If password confirm is empty on blur, there's no reason to try validating it.
  The user may just be tabbing through fields.
diff: @@ -206,10 +206,14 @@ module.exports = React.createClass({
  }
  break;
  case FIELD_PASSWORD_CONFIRM:
  + if (allowEmpty && pwd2 === "") {
  + this.markFieldValid(fieldID, true);
  + } else {
  this.markFieldValid(
  fieldID, pwd1 == pwd2,
  "RegistrationForm.ERR_PASSWORD_MISMATCH",
  );
  + }
  break;
  }
  },
  