Can anyone help? having problems with Spry Horizontal Menu in IE

Question

Hi can anyone take a look at the code ive got or go to the site www.cj-it-pcfix.info ( using IE ) and see why the sub-submenu covers half of the submenu box? If you hover on "computer Store" then hover over any of the tabs below that you will see what i mean. here is the code...
ANY HELP WOULD BE GREAT!!
@charset "UTF-8";
/* SpryMenuBarHorizontal.css - Revision: Spry Preview Release 1.4 */
/* Copyright (c) 2006. Adobe Systems Incorporated. All rights reserved. */
LAYOUT INFORMATION: describes box model, positioning, z-order
/* The outermost container of the Menu Bar, an auto width box with no margin or padding */
ul.MenuBarHorizontal
    margin: 0;
    padding: 0;
    list-style-type: none;
    font-size: 100%;
    cursor: default;
/* Set the active Menu Bar with this class, currently setting z-index to accomodate IE rendering bug: http://therealcrisp.xs4all.nl/meuk/IE-zindexbug.html */
ul.MenuBarActive
    z-index: 1000;
/* Menu item containers, position children relative to this container and are a fixed width */
ul.MenuBarHorizontal li
    margin: 0;
    padding: 0;
    list-style-type: none;
    font-size: 10.3px;
    position: relative;
    cursor: pointer;
    width: 12em;
    float: left;
/* Submenus should appear below their parent (top: 0) with a higher z-index, but they are initially off the left side of the screen (-1000em) */
ul.MenuBarHorizontal ul
    padding: 0;
    list-style-type: none;
    font-size: 100%;
    z-index: 1020;
    cursor: default;
    width: 8.2em;
    position: absolute;
    margin: 0;
    left: -1000em;
/* Submenu that is showing with class designation MenuBarSubmenuVisible, we set left to auto so it comes onto the screen below its parent menu item */
ul.MenuBarHorizontal ul.MenuBarSubmenuVisible
    left: auto;
/* Menu item containers are same fixed width as parent */
ul.MenuBarHorizontal ul li
    width: 13.5em;
/* Submenus should appear slightly overlapping to the right (95%) and up (-5%) */
ul.MenuBarHorizontal ul ul
    margin-top: 0%;
    margin-right: 0;
    margin-bottom: 0;
    margin-left: 100%;
    position: absolute;
/* Submenu that is showing with class designation MenuBarSubmenuVisible, we set left to 0 so it comes onto the screen */
ul.MenuBarHorizontal ul.MenuBarSubmenuVisible ul.MenuBarSubmenuVisible
    left: auto;
    top: 0;
DESIGN INFORMATION: describes color scheme, borders, fonts
/* Submenu containers have borders on all sides */
ul.MenuBarHorizontal ul
    border: 1px solid #CCC;
#MenuBar2 {
    padding-left: 5px;
.border {
    border-right-width: 1px;
    border-right-style: solid;
    border-right-color: #f0f0f0;
/* Menu items are a light gray block with padding and no text decoration */
ul.MenuBarHorizontal a
    display: block;
    cursor: pointer;
    background-color: #0579b1;
    color: #FFFFFF;
    text-decoration: none;
    padding-top: 0.5em;
    padding-right: 0.75em;
    padding-bottom: 0.5em;
    padding-left: 0.75em;
    border-left-width: 1px;
    border-left-style: solid;
    border-left-color: #f0f0f0;
    text-align: left;
/* Menu items that have mouse over or focus have a blue background and white text */
ul.MenuBarHorizontal a:hover, ul.MenuBarHorizontal a:focus
    background-color: #000000;
    color: #FFFFFF;
/* Menu items that are open with submenus are set to MenuBarItemHover with a blue background and white text */
ul.MenuBarHorizontal a.MenuBarItemHover, ul.MenuBarHorizontal a.MenuBarItemSubmenuHover, ul.MenuBarHorizontal a.MenuBarSubmenuVisible
    background-color: #a8a8a8;
    color: #FFFFFF;
    border: 1px solid #000000;
SUBMENU INDICATION: styles if there is a submenu under a given menu item
/* Menu items that have a submenu have the class designation MenuBarItemSubmenu and are set to use a background image positioned on the far left (95%) and centered vertically (50%) */
ul.MenuBarHorizontal a.MenuBarItemSubmenu
/* Menu items that have a submenu have the class designation MenuBarItemSubmenu and are set to use a background image positioned on the far left (95%) and centered vertically (50%) */
ul.MenuBarHorizontal ul a.MenuBarItemSubmenu
/* Menu items that are open with submenus have the class designation MenuBarItemSubmenuHover and are set to use a "hover" background image positioned on the far left (95%) and centered vertically (50%) */
ul.MenuBarHorizontal a.MenuBarItemSubmenuHover
/* Menu items that are open with submenus have the class designation MenuBarItemSubmenuHover and are set to use a "hover" background image positioned on the far left (95%) and centered vertically (50%) */
ul.MenuBarHorizontal ul a.MenuBarItemSubmenuHover
BROWSER HACKS: the hacks below should not be changed unless you are an expert
/* HACK FOR IE: to make sure the sub menus show above form controls, we underlay each submenu with an iframe */
ul.MenuBarHorizontal iframe
    position: absolute;
    z-index: 1010;
/* HACK FOR IE: to stabilize appearance of menu items; the slash in float is to keep IE 5.0 from parsing */
@media screen, projection
    ul.MenuBarHorizontal li.MenuBarItemIE
    display: inline;
    background: #FFF;
    float: left;

Answer 1

You have a set of conflicting widths:
ul.MenuBarHorizontal li { width: 12em;}
ul.MenuBarHorizontal ul { width: 8.2em;}
ul.MenuBarHorizontal ul li { width: 13.5em;}
ul.MenuBarHorizontal ul ul
    margin-top: 0%;
    margin-right: 0;
    margin-bottom: 0;
    margin-left: 100%;
    position: absolute;
So, to translate:
All list items will be 12 ems wide
First submenu list (ul) will be 8.2ems wide
First submenu list items will be 13.5ems wide
this supersedes the 12ems for all sub and sub-submenu list items
Sub-submenu lists (ul) will hang off the right side (margin-left: 100%)
Internet Explorer is interpreting #4 to mean at the right side of the ul (which is at 8.2em)
Other browsers are interpreting #4 to mean at the right side of the li (which is at 13.5em)
I believe that is what is happening on your menus.
Beth