Spry MenuBar F. Fox fine, IE Explorer displays off

Question

Hello Friends,
I am having an issue with my Horizontal SpryMenubar.
In Firefox all seems fine. However when I load my website in IE Explorer, a black bar, (same length as my Spry Menubar) appears below the actual Menubar. It almost seems like it is part of the Menubar and but is pushed down out of position.
I have included my CSS and a screen shot to illustrate the issue.
If anyone can shed some light on this I would be very grateful hearing from you. Many thanks in advance for your assistance!
@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;
    width: 600px;
    margin:auto;
    background-color: #000000;
/* 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
    list-style-type: none;
    font-size: 100%;
    position: relative;
    cursor: pointer;
    top: -55px;
    width: 9em;
    padding: 2px;
    float: right;
    background-color: #000000;
/* 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
    margin: 0;
    padding: 0;
    list-style-type: none;
    font-size: 100%;
    z-index: 1020;
    cursor: default;
    width: 8.2em;
    position: absolute;
    left: -1000em;
    top: 10px;
/* 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: 10px;
/* Submenus should appear slightly overlapping to the right (95%) and up (-5%) */
ul.MenuBarHorizontal ul ul
    position: absolute;
    margin: -5% 0 0 95%;
/* 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;
    background-color: #000000;
/* Menu items are a light gray block with padding and no text decoration */
ul.MenuBarHorizontal a
    cursor: pointer;
    background-color: #000000;
    color: #FFFFFF;
    font-family: "Century Gothic";
    font-size: 16px;
    font-style: normal;
    font-weight: normal;
    padding-top: 0.5em;
    padding-right: 0.75em;
    padding-bottom: 0.5em;
    padding-left: 0.75em;
/* Menu items that have mouse over or focus have a blue background and white text */
ul.MenuBarHorizontal a:hover, ul.MenuBarHorizontal a:focus
    color: #33FF66;
/* 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
    color: #FF0000;
    font-family: "Century Gothic";
    font-size: 16px;
    font-style: normal;
    font-weight: normal;
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
    background-image: url(SpryMenuBarDown.gif);
    background-repeat: no-repeat;
    background-position: 95% 50%;
/* 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
    background-image: url(SpryMenuBarRight.gif);
    background-repeat: no-repeat;
    background-position: 95% 50%;
/* 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
    background-image: url(SpryMenuBarDownHover.gif);
    background-repeat: no-repeat;
    background-position: 95% 50%;
/* 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
    background-image: url(SpryMenuBarRightHover.gif);
    background-repeat: no-repeat;
    background-position: 95% 50%;
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;
    f\loat: left;
    background-color: #000000;

Answer 1

Hi,
The following code will give you a nice black line as you described:
ul.MenuBarHorizontal
    margin: 0;
    padding: 0;
    list-style-type: none;
    font-size: 100%;
    cursor: default;
    width: 600px;
    margin:auto;
    background-color: #000000;
My advice, keep the original CSS and create a myStyles.css which is loaded after the Spry CSS. myStyles.css will then contain your mods. This makes it much easier to keep track of when something goes wrong.
Hope this helps,
Ben