Explorer 6 -- pixle problem

i am running multiple Explorers and i have noticed a problem with my layout,

i was wondering if someone could take a look at abit of my CSS:-

.pic {
position: absolute;
margin: 330px 0px 0px 10px;
padding: 0px;
border: 2px solid #2B3339;
color: #cccccc;
background: #9DA5AD;
width: 150px;
height: 150px;
}

AND

.nav {
position: absolute;
text-align: center;
font-size: 12px;
font-family: Verdana,Arial,sans-serif;
padding: 10px;
margin: 80px 0px 0px 10px;
border: 2px solid #2B3339;
color: #cccccc;
background: #9DA5AD;
width: 130px;
height: 220px;
}

( XHTML Strict and CSS )

The problem is in my layout the "pic" is below my "nav" and they are the same width, in opera, explorer 7, netscape, aol but in Explorer 6 the "pic" box is 2px shorter, 5px taller and has moved 10px up.
any ideas how i can solve the pixle problem?

the rest of the page is fine, not abit out of place, just the "pic" box