see if this is the issue. go to ato->add HTML/CSS Inserts->CSS Inserts and scroll to the bottom where you will see
HTML Code:
div#menu1 {
background: #146EB4;
}
div#menu1 ul.rMenu li a:hover {text-decoration: underline},
}
.custom {
float: left;
font-family: Times New Roman;
font-size: 14px;
font-style: italic;
color: #4a4a4a;
text-align: left;
width: 591px;
margin: 0 0 0 10px;
padding: 0;
}
div#text-3{
background: url(/wp-content/themes/atahualpa353/images/text-widget-bg.gif) repeat-x;
border: solid 0px;
color: #ffffff;
height: 140px;
}
notice the
div#menu1 ul ends with a '},' followed on the next line with a nother '}'? Remove the '},'. This is invalid syntax in the CSS.
While most browsers (Safari, FireFox, Chrome) can handle something like this, IE generally throws a fit. So take it out and see what happens