[AlexBell]

Thanks, Dwanthy, I appreciate you taking the trouble to give me this information. But I'm afraid I'm not sure if this is the problem

Most of my chapters etc are in a div.section. This is the CSS for them

div.section {
margin: 0;
padding: 1em 0 0 0;
page-break-after: always;
} /* Sets top margin and page break for preface and chapters. */
div.section h2 { line-height: 120%; }

As you can see I use page-break-after: always;

I will experiment with page-break-after: auto; and see if that helps.

PS. Could you comment on the benefits of using iPad as a conversion output format please? I just use the same ePub format for an iPad as I use for my Sony.