The image is properly highlighted (underlined) when hovered, and the URL shows, but clicking does nothing. Since the link can be opened via right-click and open in new window or tab, an event listener is likely the culprit. The only shown listener of the click event is you_combo.php, but the code it produces is minified and so difficult to debug.
Listener info:
Node: td.field.col_role.cell.c2
Function: yui_combo.php:6354:109
Type: Bubbling
Any clues?