Your skin is not up to date. We changed from linkbutton to button for better accessibility because linkbutton doesn't work if javascript is disabled but button does.

In order to style the button to look like a link we added this css to all skins in the styletext.css file.

.buttonlink {display:table-cell;background-color:transparent;border-style:none;color: #0033FF;cursor: pointer;text-decoration: underline; font-size: 9px;}

After you add that, you need to clear the server cache by touching web.config and clear your browser cache and then you will see the change.

Best,

Joe