[Решено] Интересная проблема с div-ами - Вопросы по CSS

#content_area{
	width:auto;
	height:auto;
	margin: -80px auto 0 auto;
	background: url(../images/bg_dark.png);
	
}

#content_area_border_l{
	width:10px;
	height:auto;
	margin: 0px auto 0 auto;
	background: url(../images/content_area_border_l.png);
	float:left;
		
}

#content_area_title{
	width:auto;
	height:auto;
	margin: 0px auto 0 auto;
		
}

#content_area_fx1{
	width:14px;
	height:47px;
	margin: 0px auto 0 auto;
	background:url(../images/content_area_fx1.png);
	float:left;
	
}

#content_area_title_txt{
	height:47px;
	margin: 0px auto 0 auto;
	background:url(../images/content_area_title_txt.png);
	float:left;
	
}

#content_area_fx2{
	width:42px;
	height:47px;
	margin: 0px auto 0 auto;
	background:url(../images/content_area_fx2.png);
	float:left;
	
}

#content_area_fx3{
	width:225px;
	height:56px;
	margin: 0px auto 0 auto;
	background:url(../images/content_area_fx3.png);
	float:right;
	
}

#content_area_txt{
	width:auto;
	height:auto;
	margin: 0px auto 0 auto;
	padding-bottom:20px;
	background: url(../images/bg_dark.png);
	
	
}

#content_area_footer{
	height:38px;
	margin: 0px auto 0 auto;
		
}

#content_area_fx4{
	width:468px;
	height:38px;
	margin: 0px auto 0 auto;
	background:url(../images/content_area_fx4.png);
	float:left;
	
}

#content_area_fx5{
	width:auto;
	height:38px;
	margin: 0px auto 0 auto;
	background:url(../images/content_area_fx5.png);
		
}

#content_area_fx6{
	width:128px;
	height:38px;
	margin: -38px auto 0 auto;
	background:url(../images/content_area_fx6.png);
	float:right;
	
}

#content_area_border_l{
	width:10px;
	height:auto;
	margin: 0px auto 0 auto;
	background: url(../images/content_area_border_l.png);
	float:left;