Salve a tutti...ho un piccolo problema con un box menu che (ovviamente) firefox mette al posto giusto ma IE no...sto impazzendo ma non trovo dove sbaglio...

codice:
body {
  font-family: verdana, arial, helvetica, sans-serif;
  background: url(sfondo.gif) repeat;
}

#contenitore {
  margin-left: auto;
  margin-right: auto;
  border : 3px outset gray;
  width: 680px;
}

#header {
  width: 680px;
  height: 140px;
  background: url(testata.gif) no-repeat top left;
}

#navmenu {
  background: url(nav.gif) repeat top left;
  width: 680px;
  height: 25px;
  text-align : center;
  font-size: 15px;
  padding-top: 5px;
}

#navmenu a {
  text-decoration: none; 
  font-weight: bold;
  color: #000;
}

#navmenu a:hover { 
  color: #fff;
}

#navmenu a:visited { 
  text-decoration: none; 
}

#content {
  width: 680px;
  background-color: #FFF;
  position: relative;
}

#menu {
	float: left;
	position: absolute;
	width: 30%;
}

#corpo {
	margin-left: 200px;
	padding-right: 10px;
	padding-top: 5px;
}

#newsa {
	margin-left: 0px;
	padding-left: 0px;
	color: red;
}

#newsb {
	margin-left: 0;
	padding-left: 0px;
}

#newsa img {
	float: left;
	margin-left: 0px;
	padding-left: 0px;
	padding: 2px;
}

#newsb img {
	float: right;
	padding: 2px;
}

#corpo h1 {
  color: red;
  font-size: 14px;
}

#corpo newsa {
  height: 80%;
}

#corpo newsb {
  height: 80%;
}

#newstot{
	height: 250px;
}

#news1 {
  float: left;
  width: 200px;
  padding: 10px;
}

#news2 {
  float: right;
  width: 200px;
  padding: 10px;
}

#footer {
  width: 660px;
  height: auto;
  text-align : center;
  font-size: 12px;
  padding-left: 10px;
  padding-right: 10px;
}

/* ANGOLI SMUSSATI */

#contenitoreCurve {
	margin-left: 10px;
	margin-right: 15px;
	margin-top: 20px;
	background: #fff;
}

.curva {
	display:block;
	height: 1px;
	overflow: hidden; 
	background: #D4D0C8;
}

.segmento1{
	margin: 0 5px
}

.segmento2{
	margin: 0 3px
}

.segmento3{
	margin: 0 2px
}

.segmento4{
	margin: 0 1px;
	height: 2px;
}

.contenuto {
	height: auto;
	padding: 1px;
}

.contenuto p {
	font: 17px Arial,sans-serif;
	margin: 0 1px;
	color: #000;
	padding: 0 4px;
}
Qualcuno saprebbe dirmi dove caspita sbaglio???
Grazie mille