I understand it's a browser problem, but I also used IE6 on Windows98. Anyway, I use these html pages to build MSebooks (using ReaderWorks) for myself. style tag is generally for making first line of a chapter unindented.
Here's what I do:
<html>
<head>
<title>Pagan and Christian Creeds</title>
<style type="text/css">
p { text-indent: 1em; margin-top: 0; margin-bottom: 0; }
p.fst { text-indent: 0em; margin-top: 0; margin-bottom: 0; }
p.note { text-indent: 0em; margin-top: 3; margin-bottom: 3; }
</style>
</head>
<body>
<p style="page-break-before:always">
<br><br><br><center><font size=2>INTRODUCTORY</font></center><br><br>
<p style=fst align=justify><font size=2>THE SUBJECT</font> of Religious Origins is a ...
<p align=justify>There is also in these matters ...
</body>
</html>
Apparently the browser doesn't see <p style=fst align=justify> tag and the line appears with 1em indent on html page and of course in the ebook.
Thanks a lot for your prompt reply. I don't know if above information is enough to give you a better idea.
Marked Solved 
