theducks - There are no lists within lists, if that's what you mean. It goes;
<p>...</p>
<ul>
<li>...</li>
<li>...</li>
</ul>
<p>...</p>
for both right and wrong instances. Can't understand why.
JSWolf - I know Sigil is only part of the picture. The title I'm converting is not aimed at any particular device but I do have periodic access to an iPad so I can test the files on that. Sigil quite accurately previews how it will display on the iPad (I guess they both use the webkit rendering engine?) but it's ADE (and all the devices I know that uses that engine) that's giving me the problem. I use Sigil to look at the code (saves me having to unzip the ePub) - I turn off Sigil's "HTML Tidy" option. So irrespective of how Sigil displays it, the code seems the same but I get two different results in ADE.