This line of the orders_list.tpl:
<td colspan="{$colspan}">[img]{$ImagesDir}/spacer.gif[/img]</td>
The image did not show for me. I had to make it like this:
<td colspan="{$colspan}"><img src="{$ImagesDir}/spacer.gif"></td>
There is one other one like that for the "no_ip.gif". Not sure if anyone else ran into that. That said, this is seriously one of the best mods out there if you have a lot of orders like we do.