Following these steps to add such icon:
1. Create a custom module, and add above script to the custom module content (if you enable WYSIWYG editor, you must put the script in html text box by click “html” button on the editor)
<script src=”http://www.stumbleupon.com/hostedbadge.php?s=6″></script>
2. Select not show title for that module
3. Goto menu “topmega”, add a new menu item, select “Separator” type, then open the “Parameters (JA Extended)” group:
– Show Title: no
– Group: yes
– Additional class: stumble
– Submenu Content: Modules, then select the above module
4. Add this style to your css file:
.stumble div{padding:0!important;margin:0!important;border:none;}
5. Save, then click button “JAT3 Clean Cache” (top right conner) to clean T3 Cache.