I think I may have found the problem. I converted the file to html, and every paragraph is set up thus:
Code:
<div style="margin-top: 1em; text-indent: 1em"><font size="3">Blah blah blah, paragraph 1.</font></div><div style="margin-top: 1em"/>
<div style="margin-top: 1em; text-indent: 1em"><font size="3">Blah blah blah, paragraph 2.</font></div><div style="margin-top: 1em"/>
And so on.
I've just re-converted it with instructions to use zero margins for every DIV tag, but it didn't help.
Any suggestions on how I could force the book to behave? I really hate having every paragraph double-spaced this way.