Sharepoint .LeftNav stylesheet displaying incorrectly in firefox

Hello All,

http://www.gotalk.com.au/Products/Pages/default.aspx

The following navigation system works correctly using Internet Explorer and Safari, but when viewed in firefox the left navigation groups itself with the navigation item below, which creates a rythmic seizure type effect, I have been altering the style sheets for this section for about an hour. I am having trouble figuring this one out can anyone help? Here is the style-sheet coding:

}
.leftNav
{
	margin-right: 10px;
	margin-left: 0px;
	margin-top: 0px;
	padding-top: 0px;
	border: 0px red solid;
	width: 130px;
	visibility: visible;
}
.leftNavSpacer
{
	width:130px;
	height:1px;
}
table.leftNavSelected
{
	font-weight: bold;
}
.leftNavSelected
{
	visibility:visible;
}
.leftNav3
{
	color: #0066CC;
	display: block;
}
.leftNav2
{
	color: #0066CC;
	display: block;
}
.leftNav1
{
	color: #0066CC;
	display: block;
}
.leftNav1
{
	font-family: verdana;
	font-size: 8pt;
	font-weight: normal;
	line-height: 14pt;
	width: 208px;
	margin: 5px 5px 5px 5px;
	background-color: #f0f0ef;
	visibility:visible;
}
.leftNav1 a
{
	font-family: verdana;  
	font-size: 9pt; 
	font-weight: normal; 
	padding-left:5px;
	display:block;
	padding-right:10px;
	visibility:visible;	
}
.leftNav2
{	
	font-family: verdana;
	font-size: 8pt;
	font-weight: normal;
	line-height: 14pt;
	width: 202px;
	margin: 0px 0px 0px 0px;
	background-color: #f0f0ef;
	visibility:visible;
}
.leftNav2 a
{
	padding-left:10px;
	display:block;
	padding-right:10px;
	visibility:visible;	
}
.leftNav3
{
	font-family: verdana;
	font-size: 8pt;
	font-weight: normal;
	line-height: 14pt;
	width: 200px;
	border: 1px solid #ccc;
	margin: 0px 0px 0px 0px;
	background-color: #f0f0ef;
	visibility:visible;
}
.leftNav3 a
{
	padding-left:18px;
	display:block;
	padding-right:10px;
	visibility:visible;	
}
.leftNavHover
{
	color:#FF9900;
}
.leftNavFlyOuts
{
	font-family:verdana; 
	font-size:8pt; 
	border-top:1px #CBD1E0 solid;
	border-left:1px #CBD1E0 solid;
	border-right:1px #CBD1E0 solid;	
}
.leftNavFlyOutsItem
{
	border-bottom:1px #CBD1E0 solid;
	background-color: #ECEFF3;
}
.leftNavFlyOutsItem a
{
	padding:1px 5px 1px 5px;
	display:block;
	color:#354260;
	*width:100px;
	min-width:100px;
}
.leftNavFlyOutsHover
{
	background-color: #B2BCD3;
}




/* Layout for Page Layouts*/

.ccRightWPZone
{
	width: 200px;
	padding-bottom:20px;
}

.ccLeftWPZone
{
	width: 100%;
	padding-bottom:20px;
}

.LeftUnderNavZone
{
	width: 130px;
}
.ccWebPartZoneSpacer
{
	width:12px;

Code (markup):