Well...maybe not! It must be a work in progress and I jumped the gun. At this point I can change my old templates so they use two identical image url tags e.g.
<a href="[IMAGE1_URL]"><img src="[IMAGE1_URL] width=140 border=0"></a>
It will "update" without giving me the red warning about two tags, but it doesn't save the changes. Making a new template from scratch with two tags will not save and gives me the red warning.
Oh, well. I told you I get anxious when Christmas comes in November.
CB