Ok, got it to work, but it's really, really ugly.
In mail/html/sendall2friend.tpl add this code:
Code:
<!--
{ if $smarty.section.num.first}
{include file="product_thumbnail.tpl" productid="xxxxxx" image_x=$wl_products[0].image_x image_y=$wl_products[0].image_y product=$wl_products[0].product full_url="Y" id="product_thumbnail"}
{/if }
-->
where xxxxxx is a product that we no longer sell but is still in the database. In reality, xxxxxx just has to be a product ID that is NOT in the products array coming into the wishlist. I chose an old product to ensure that it would never be in that array.
I don't like this kludge one bit, but working is better than not working, eh?
Walt