Index: field_group.js
===================================================================
--- field_group.js	(revision 362)
+++ field_group.js	(working copy)
@@ -40,8 +40,8 @@
   execute: function (context, settings, type) {
     $('div.field-group-accordion-wrapper', context).once('fieldgroup-effects', function () {
       var wrapper = $(this);
-
       wrapper.accordion({
+        heightStyle: "content",
         autoHeight: false,
         active: '.field-group-accordion-active',
         collapsible: true,