[sbin]

This is the css applied to the html:

h1
	{margin-top:4em;
	margin-bottom:1,5em;
	page-break-before;
	page-break-after:avoid;
	font-size:2em;
	color:#000000	
	}
h2
	{margin-top:3em;
	margin-bottom:1,5em;
	margin-left:0pt;
	page-break-after:avoid;
	font-size:1,5em;
	color:#000000;
	}
h3
	{margin-top:2em;
	margin-bottom:1,5em;
	line-height:normal;
	page-break-after:avoid;
	font-size:1,25em;
	color:#000000;
	}
p
	{margin:0pt;
	text-indent:1em;
	color:#000000
	}
ul
	{text-indent:2em;
	}
ol
	{text-indent:2em;
	}
a
	{color:#000000;
	text-decoration:underline;
	}

Quite simple, as you can see.
And the html is just text with italics, bolds, h1 and h2 tags. No images, nothing fancy.

In ADE the epub is displayed correctly.