WP-Pages Nav CSS error in IE6 XP

This relates to a plugin but it is a css issue really. There is a strange heigh bug on a site that I am building that I cannot figure out. I know it is probably an ie6 bug but cannot find a relevant article that will help me.

The menubar along the top looks OK on a mac using either firfox or safari but on pc ie.6 the height of the grey bar seems to be double about 200px, it should be around 100px

here is the relevant css for the wp pages_nav menu plugin

code

/* Pages Nav */
#pages_nav {
font-family: courier, courier new, monotype;
background-color:none;
border-top:1px dashed #000000;

margin:12px 0px -20px 35px;
padding-left:0px;
padding-right:0px;
height:80px;
width:860px;
/*overflow:hidden;*/
border-bottom:1px dashed #000000;
/*overflow: hidden;*/
/*padding-top:15px;*/
}

#pages_nav ul {

background-color:none;
/*margin:0px;*/
padding-top:3px;
/*padding-bottom:2px;*/
padding-left: 0px;
padding-right: 0px;
/*border: 1px white;*/
font-size:1.25em;
list-style: none;

}

#pages_nav ul.level2 {
border-top:1px dashed #000000;
/*border-bottom:1px dashed #000000;*/
background-color:none;

padding:10px 0 10px 0;

}

#pages_nav ul.level1{margin-top:10px;margin-bottom:1px;}

#pages_nav ul.children {

}

#pages_nav li {
margin: 0px;
padding-top:3px;
padding-bottom:2px;
padding-left: 2px;
padding-right: 2px;
/*border-left: solid 2px white;*/
display:inline;
}
#pages_nav a{
color:#000;
/*font-weight: bold;*/
}

#pages_nav li.current {
margin-top:10px;
padding-top:3px;
padding-bottom:2px;
padding-left: 5px;
padding-right: 5px;
background-color:none;
clear:both;
/*border:solid 1px #3F80B6;*/
}
#pages_nav li.current a{
color:#3F80B6;
}
code

Any ideas?