Spry menu IE Problems, shifting submenu to the right

Question

ok haveing trubble with the menu shifting to the right of the drop down, it works in all other but IE... any ideas ?
code:
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
          list-style-type: none;
          font-size: 105%;
          cursor: default;
          width: auto;
          margin-top: -32px;
          margin-right: 0%;
          margin-bottom: 0px;
          margin-left: 5em;
          height: auto;
          float: left;
          border-bottom-style: none;
          font-weight: normal;
          line-height: normal;
          font-style: normal;
          color: #000;
          padding-top: 0px;
          padding-right: 0%;
          padding-bottom: 0px;
          padding-left: 0%;
          text-align: center;
          border-top-style: none;
          border-right-style: none;
          border-left-style: none;
/* 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
          padding: 0;
          list-style-type: none;
          font-size: 100%;
          position: relative;
          text-align: center;
          cursor: pointer;
          width: auto;
          float: left;
          margin-top: 10px;
          margin-right: 0;
          margin-bottom: 0;
          margin-left: 0;
          visibility: inherit;
/* 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: 110%;
          z-index: 1020;
          cursor: default;
          width: 12em;
          position: absolute;
          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;
          -khtml-opacity: 0.9;
          background-color: #666;
/* Menu item containers are same fixed width as parent */
ul.MenuBarHorizontal ul li
          width: 11em;
/* Submenus should appear slightly overlapping to the right (95%) and up (-5%) */
ul.MenuBarHorizontal ul ul
          position: absolute;
          margin-right: 0;
          margin-bottom: 0;
          width: 12em;
          margin-left: 12em;
/* 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;
          background-color: #666;
DESIGN INFORMATION: describes color scheme, borders, fonts
/* Submenu containers have borders on all sides */
ul.MenuBarHorizontal ul
          border: 1.5px solid #fff;
          font-size: 12px;
          padding-top: 0px;
/* Menu items are a light gray block with padding and no text decoration */
ul.MenuBarHorizontal a
          display: block;
          cursor: auto;
          background-color: opacity
:0.4;
          color: #FFFFFF;
          text-decoration: none;
          font-size: 100%;
          padding-top: 0em;
          padding-right: 2em;
          padding-bottom: 0em;
          padding-left: 0em;
/* Menu items that have mouse over or focus have a blue background and white text */
ul.MenuBarHorizontal a:hover, ul.MenuBarHorizontal a:focus
          color: #F69;
          background-color: transparent;
/* 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: transparent;
          color: #FF6699;
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 */ 
ul.MenuBarHorizontal li.MenuBarItemIE
          display: inline;
          f\loat: left;
          background-color: #FFF;
          filter:alpha(opacity=0);
          /* [disabled]-moz-opacity:0.; */
          -khtml-opacity: 0.;
          opacity: 0.;

Answer 1

There are so many (unnecessary) changes made to the SpryMenuBarHorizontal.css that I have given up.
Please have a look here http://www.dwcourse.com/dreamweaver/ten-commandments-spry-menubars.php#one and start again.
Gramps