Se me va un pixel en Google Chrome

[scobee]

#header{
border:0px;
border-bottom:none;
background: url(/themes/barlow/images/fondo-web.jpg) repeat-x;
}
#header h1 a{color:#5991C0;
}#header .slogan{color:#fff;
}#header-additional,
#header-additional h2,
#header-additional h3,
#header-additional h4,
#header-additional h5,
#header-additional h6,
#header-additional a,
#header-additional a:visited{color:#fff;
font-weight:bold;
}

#header-additional{
color:#5991C0;
margin-right:1px;
margin-bottom:-300px;
}

#header-additional a:hover{
color:#4C954E;

}

#header-additional p{margin:0}


#menu{margin:0 0 -51px 0;
padding:0px 0 0 0;
width:100%;
font-size:100%;
line-height:210%;
}
#menu .secondary_menu{background: url(/themes/barlow/images/menu.jpg);
background-repeat:no-repeat;
margin-bottom:51px;
}