CSS - Opera 7/win Ie5/mac - Troublesome

<div id="content_container">
  <div id="belowbg">
    <div id="left"> 
       <div id="h3lft"> 
          <h3>Welcome</h3>
       </div>
       <div id="contentlft">
	<p>Lorem ipsum ...</p>
       </div>
       <div id="footlft"></div>
     </div>
     <div id="right"> 
       <div id="h3rght"> 
          <h3>Latest</h3>
        </div>
	<div id="contentrght">
				<p>Lorem ipsum ...</p>
	</div>
	<div id="footrght"></div>
     </div>
   </div>
   <div id="footer"> 
      <p>text</p>
    </div>
</div>

#content_container {
	position: absolute;
	top: 406px;
	left: 50%;
	margin: 0 0 0 -372px;
	width: 742px;
	height: auto;
	z-index: 10;
}

#belowbg {
	padding: 0 11px 11px 11px;
	width: 720px;
	height: auto;
	background-color: #313131;
}

/*hack to ensure that Mozilla encloses the floats with the #belowbg div*/
#belowbg:after {
    content: "."; 
    display: block; 
    height: 0; 
    clear: both; 
    visibility: hidden;
}

#left {
	float: left;
	width: 481px;
	height: auto;
	padding: 0;
	margin: -25px 0 0 0;
}

#h3lft {
	width: 481px;
	height: 25px;
	background: url(images/welcomehd.gif) no-repeat;
	text-indent: -9000px;
	display: block;
	position: relative;
	margin: 0;
	padding: 0;
}

#contentlft {
	width: 459px;
	height: auto;
	background-color: #293942;
	border: 1px solid #636B73;
	margin: -1px 0 0 0;
	padding: 10px 10px 0 10px;
	font-size: 1.2em;
	line-height: 1.6;
	display: block; 
}

#footlft {
	width: 481px;
	height: 20px;
	margin: -1px 0 0 0;
	background: url(images/welcomeft.gif) no-repeat;
	display: block;
}

#right {
	float: right;
	width: 230px;
	height: auto;
	padding: 0;
	margin: -25px 0 0 0;
}

#h3rght {
	width: 230px;
	height: 25px;
	background: url(images/latesthd.gif) no-repeat;
	text-indent: -9000px;
	display: block;
	position: relative;
	margin: 0;
	padding: 0;
}

#contentrght {
	width: 208px;
	height: auto;
	background-color: #525252;
	border: 1px solid #636B73;
	margin: -1px 0 0 0;
	padding: 10px 10px 0 10px;
	font-size: 1.2em;
	line-height: 1.6;
	display: block;
}

#footrght {
	width: 230px;
	height: 20px;
	margin: -1px 0 0 0;
	background: url(images/latestft.gif) no-repeat;
	display: block;
}

#footer {
	position: relative;
	top: 0;
	left: 0;
	width: 720px;
	height: 188px;
	padding: 20px 10px;
	margin: 0;
	background: url(images/btmhatlines.gif) right no-repeat;
	font-size: 1.1em;
	line-height: 1.6;
	text-align: center;
}

html, body, h1, h2, h3, h4, ul, li {
	margin: 0;
	padding: 0;
}
h1 img {
	display: block;
}
img {
	border: 0px none;
}
a {
	color: #464544;
}
a:hover {
	color: #FFA405;
}
.left {
	float: left;
}
.right {
	float: right;
}

.clear {
	clear: both;
}


body {
	background: #ECF4F7;
	text-align: center;
	font: 11px verdana, arial, sans-serif;
	color: #695F4C;
	padding-bottom: 10px;
}

/** layout **/
#wrapper {
	text-align: left;
	margin: 37px auto;
	width: 839px;
	background: #ffffff;
	position: relative;
	padding: 0;
}

#header {
  background: #D9D1BC url('images/logo.jpg') no-repeat;
  height: 192px
}


#nav {
  background: #4B5360;
  position: absolute;
  top: 153px;
  left: 339px;
  width: 499px;
  height: 20px;
  padding: 9px 0px;
  text-align: center;
  margin: 0;
}

#nav li {
  list-style: none;
  display: inline;
  color: #fff;
}
#nav a {
  text-decoration: none;
  color: #fff;
}


#body {
  background-color:#FFF;
}

#postheadb {
  font: 10px verdana, arial, sans-serif;
  font-weight: bold;
  color: #FFFAF0;
  float: right;
  width: 500px;
  background: #2dbaa7;
}
#postheadb .inner {
  padding: 6px 12px;
  width/**/:/**/ 501px;
  Height/**/:/**/ 10px;
}
#postheadab p {
  margin: 0.9em 0;
}

#posthead {
  font: 10px verdana, arial, sans-serif;
  font-weight: bold;
  color: #FFFAF0;
  float: right;
  width: 839px;
  background: #2dbaa7;
}
#posthead .inner {
  padding: 6px 12px;
}
#posthead p {
  margin: 0.9em 0;
}

#contentb{
  font: 12px verdana, arial, sans-serif;
  color: #cad10e;
  float: right;
  background: #40789d;
  
}
  
#contentb .inner {
  padding: 6px 12px;
  width/**/:/**/ 476px;
  Height/**/:/**/ 52px;
}

#contentb p {
  margin: 0.9em 0;
}

#content{
  font: 12px verdana, arial, sans-serif;
  color: #cad10e;
  float: right;
  width: 839px;
  background: #40789d;
}
  
#content .inner {
  padding: 12px 12px;
}

#content p {
  margin: 0.9em 0;
}

#copyright {
  text-align: center;
  background: #030303;
  font-size: 9px;
  padding: 2px;
  width/**/:/**/ 92.8em;
  Height/**/:/**/ 3em;
}


 input
{
  color: #FFFAF0;
  background: #40789d;
  vertical-align: middle;
}

.email input
{
position:absolute;
left: 40px;
top: 20px;
color: #781351;
width: 225px;
background: #fee3ad;

}

#sidebar
{
margin-bottom:0;
float: left;
background: #D3D3D3;
padding: 395px 169px;
Height/**/:/**/ 70px;
}

.videobar {
position:absolute;
left: 20px;
top: 200px;
height: 600px;
width: 300px;
float: right;
padding: 10px;
}

.password input
{
position:absolute;
left: 40px;
top: 60px;
color: #781351;
width: 225px;
background: #fee3ad;

}

#login{
 font: 10px verdana, arial, sans-serif;
  font-weight: bold;
  color: #FFFAF0;
  float: right;
  width: 839px;
  background: #2dbaa7;
}

#searchTerm{
width: 125px;
height: 15px;
}

#submitsearch{
height: 22px;
}

#login .inner {
  padding: 90px 12px;
}
#login p {
  margin: 0.9em 0;
}

.submit input{
position:absolute;
left: 40px;
top: 90px;
width: 55px;
height: 22px;
padding: 0;
}

fieldset {

border: 1px solid #781351;
position: absolute;
left: 300px;
height: 130px;
top: 215px;
width: 300px;
}

legend {
background-color: #ffa20c;
border: 1px solid #781351;
line-height: 1.5em;
position: relative;
top: -0.75em;
}