app/assets/javascripts/spree/backend/states.js in spree_backend-2.4.10 vs app/assets/javascripts/spree/backend/states.js in spree_backend-3.0.0.rc1

@@ -1,11 +1,11 @@
 $(document).ready(function () {
   'use strict';
 
   $('#country').on('change', function () {
-    var new_state_link_href = $('#new_state_link a').prop('href');
+    var new_state_link_href = $('#new_state_link').prop('href');
     var selected_country_id = $('#country option:selected').prop('value');
     var new_link = new_state_link_href.replace(/countries\/(\d+)/,
       'countries/' + selected_country_id);
-    $('#new_state_link a').attr('href', new_link);
+    $('#new_state_link').attr('href', new_link);
   });
-});
\ No newline at end of file
+});