Positioning of navigation list different in FF and IE...

I'm having a bear of a time figuring this one out...

Please see my site http://www.jomar.com/jomargroup_index.html

There are a few things I need to fix yet, so please only concern yourself with the bottom navigation (Terms & Conditions / Metal Exchange).

If you are viewing this page in IE, the bottom navigation lines up horizontally and vertically very nicely in the blue area. If you are viewing it in FF, it seems to jump down about 5-10 pixels.

What's wrong here?

The HTML

<div id="footer">
	<div id="footer_content">
		<div id="footer_nav">
				<ul class="main_nav">
					<li><a href"#">Terms & Conditions</a></li>
					<li><a href"#">Metal Exchange</a></li>
				</ul>					
	  	</div><!--end footer_nav-->
		<div id="footer_info">
			<p class="footer_text">
				&copy; Jomar Group<br />
				7243 Miller Drive, Warren, MI  48092<br />
				p: 800-325-5690 / f: 800-628-4194
			</p>	
		</div><!--end footer_info-->
	</div><!--end footer_content-->
</div><!--end footer-->

Code (markup):

and the pertinent CSS

#footer {
	margin-top: -100px; /* negative value of footer height */
	height: 100px;
	clear:both;
	background-image:url(JomarGroup/images/bkgd_tile_foot.gif);
	background-repeat:repeat-x;
} 

#footer_content {
	background-image:url(JomarGroup/images/bkgd_footer.gif);
	z-index:1;
	height:100px;
	background-repeat:no-repeat;
	background-position:center;
	margin-left:auto;
	margin-right:auto;
	width:610px;
}

#footer_nav {
	margin:0;
	z-index:2;
	width:600px;
	padding:15px 0 0 0;
	text-align:center;
}

#footer_info {
	z-index:2;
	width:600px;
	padding:15px 0 0 0;
	text-align:center;
}

.footer_text {
	font-family:Arial, Helvetica, sans-serif;
	color:white;
	font-size:12px;
}

.main_nav ul {
	list-style-type:none;
}


.main_nav li {
	display:inline;
	font-size:12px;
	margin:30px;
}

.main_nav li a {
	font-family:Arial, Helvetica, sans-serif;
	text-decoration:none;
	color:white;
}

.main_nav li a:hover {
	color:#FFCC33;
}

Code (markup):

Not sure if it matters, but I've used some sticky footer code to force the footer at the bottom of the page.

 

What version of IE?

 

I've previewed it in IE 6