underline in the middle???

[favor925]

is anyone can help me with this??
it doesn't happen old version of IE, after I upgrade to IE8, the underline goes in middle of the bars (like the picture):

http://www.dynamicdrive.com/forums/attachment.php?attachmentid=3234&d=1270961460

the code I am using:
_________________________________________________________________________________________________

<link rel="stylesheet" type="text/css" href="jquerycssmenu.css" />

<!--[if lte IE 7]>
<style type="text/css">
html .jquerycssmenu{height: 1%;} /*Holly Hack for IE7 and below*/
</style>
<![endif]-->

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js"></script>
<script type="text/javascript" src="jquerycssmenu.js"></script>
_______________________________________________________________________________________________
<div id="myjquerymenu" class="jquerycssmenu">
<ul>
<li><a href="#">Item 1</a></li>
<li><a href="#">Item 2</a></li>
<li><a href="#">Folder 1</a>
<ul>
<li><a href="#">Sub Item 1.1</a></li>
<li><a href="#">Sub Item 1.2</a></li>
<li><a href="#">Sub Item 1.3</a></li>
<li><a href="#">Sub Item 1.4</a></li>
</ul>
</li>
<li><a href="#">Item 3</a></li>
<li><a href="#">Folder 2</a>
<ul>
<li><a href="#">Sub Item 2.1</a></li>
<li><a href="#">Folder 2.1</a>
<ul>
<li><a href="#">Sub Item 2.1.1</a></li>
<li><a href="#">Sub Item 2.1.2</a></li>
<li><a href="#">Folder 3.1.1</a>
<ul>
<li><a href="#">Sub Item 3.1.1.1</a></li>
<li><a href="#">Sub Item 3.1.1.2</a></li>
<li><a href="#">Sub Item 3.1.1.3</a></li>
<li><a href="#">Sub Item 3.1.1.4</a></li>
<li><a href="#">Sub Item 3.1.1.5</a></li>
</ul>
</li>
<li><a href="#">Sub Item 2.1.4</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#">Item 4</a></li>
</ul>
<br style="clear: left" />
</div>

css code:
___________________________________________________________________________

.jquerycssmenu{
font: bold 12px Verdana;
border-bottom: 1px solid black;
padding-left: 15px; /*offset of tabs relative to browser left edge*/
}

.jquerycssmenu ul{
margin: 0;
padding: 0;
list-style-type: none;
}

/*Top level list items*/
.jquerycssmenu ul li{
position: relative;
display: inline;
float: left;
}

/*Top level menu link items style*/
.jquerycssmenu ul li a{
display: block;
background: white url(tintblue.gif) top center repeat-x;; /*background of tabs (default state)*/
padding: 5px 7px 4px 7px;
margin-right: 3px; /*spacing between tabs*/
border: 1px solid #778;
border-bottom-width: 0;
color: #2d2b2b;
text-decoration: none;
}

.jquerycssmenu ul li a:hover{
background-image: url(tintbluedark.gif) /*tab link background during hover state*/
}

/*1st sub level menu*/
.jquerycssmenu ul li ul{
position: absolute;
left: 0;
display: block;
visibility: hidden;
border-top: 1px solid black;
}

/*Sub level menu list items (undo style from Top level List Items)*/
.jquerycssmenu ul li ul li{
display: list-item;
float: none;
}

/*All subsequent sub menu levels vertical offset after 1st level sub menu */
.jquerycssmenu ul li ul li ul{
top: 0;
}

/* Sub level menu links style */
.jquerycssmenu ul li ul li a{
font: normal 13px Verdana;
width: 160px; /*width of sub menus*/
background: white;
color: black;
padding: 4px 5px;
margin: 0;
border-top-width: 0;
border-bottom: 1px solid black;
}

.jquerycssmenu ul li ul li a:hover{ /*sub menus hover style*/
background: #eff9ff;
color: black;
}

/* ######### CSS classes applied to down and right arrow images ######### */

.downarrowclass{
position: absolute;
top: 7px;
right: 5px;
}

.rightarrowclass{
position: absolute;
top: 5px;
right: 5px;
}

[BLiZZaRD]

IE5??!!?? Wow. Anyway, have a link to the page? there is more than just the menu causing a problem but would need to identify it's..err... identifier.