in the menu_ie.css file, you will need to set a width to the ul#cssmw li a, ul#cssmw li a.link selector:
ul#cssmw li a, ul#cssmw li a.link {
background-image: none;
border-bottom: solid 1px #fff;
border-right: solid 1px #fff;
color: #2D2B2E;
display: block;
font-family: Tahoma, Geneva, sans-serif;
font-size: 10px;
font-style: normal;
font-weight: normal;
height: 16px;
margin: 0 0 0 0;
padding-left: 22px;
padding-right: 3px;
padding-top: 4px;
text-decoration: none;
text-transform: uppercase;
outline-style: none;
width:90px;
}