I noticed a bug with the image icon in the messages area of WHD.
<img border="0" ismap="" src="/helpdesk/message/close_widget.gif?v=12_2_0_9011">
This shows as a broken image link, yet, on the all messages screen a working image link is available.
<img border="0" ismap="" src="/helpdesk/delete_line_item.gif?v=12_2_0_9011">
I hope this helps.