Spry menubar not working correctly in IE9 - fixed width or padding or...?

Question

Need help.  My spry menu bar isn't all the way to the right when in compatibility mode in IE9.  When not in compatibility mode it is even further from the right.  Is there a way to make it so that it is all the way to the right on both compatibility and non-compatibility modes.  Is there a better way than changing the padding or can I do a fixed width?  www.superedgar.com
The spry code is below.
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: auto;
font-family: Arial, Helvetica, sans-serif;
/* 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: 1010;
/* 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: 100%;
position: relative;
text-align: left;
cursor: pointer;
width: auto;
float: left;
white-space: nowrap;
border-top-width: 1px;
border-right-width: 1px;
border-bottom-width: 1px;
border-left-width: 1px;
border-top-style: solid;
border-right-style: solid;
border-bottom-style: solid;
border-left-style: solid;
border-top-color: #cccccc;
border-right-color: #cccccc;
border-bottom-color: #cccccc;
border-left-color: #cccccc;
background-image: url(../images/Menu%20Bars/metalsubmenubargray.gif);
/* 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;
width: auto;
left: -1000em;
float: none;
white-space: nowrap;
background-image: url(../images/Menu%20Bars/metalsubmenubargray.gif);
/* 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
cursor: auto;
left: auto;
background-image: url(../images/Menu%20Bars/metalsubmenubargray.gif);
/* Menu item containers are same fixed width as parent */
ul.MenuBarHorizontal ul li
float: none;
width: 14em;
background-image: url(../images/Menu%20Bars/metalsubmenubargray.gif);
/* Submenus should appear slightly overlapping to the right (95%) and up (-5%) */
ul.MenuBarHorizontal ul ul
margin: -5% 0 0 95%;
border-right-style: solid;
border-left-style: solid;
border-right-color: #999999;
border-left-color: #999999;
border-right-width: 2px;
border-left-width: 1px;
/* 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: 0;
DESIGN INFORMATION: describes color scheme, borders, fonts
/* Submenu containers have borders on all sides */
ul.MenuBarHorizontal ul
position: absolute;
width: 14em;
/* Menu items are a light gray block with padding and no text decoration */
ul.MenuBarHorizontal a
display: block;
cursor: pointer;
color: #392B68;
text-decoration: none;
font-family: Arial, Helvetica, sans-serif;
font-size: 14px;
font-weight: bold;
padding-top: 8px;
padding-right: 29px;
padding-bottom: 7px;
padding-left: 30px;
/* Menu items that have mouse over or focus have a blue background and white text */
ul.MenuBarHorizontal a:hover, ul.MenuBarHorizontal a:focus
color: #392B68;
background-image: url(../images/Menu%20Bars/metalsubmenubargrayhover.gif);
/* 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: #392B68;
width: auto;
float: none;
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-position: 95% 50%;
color: #392B68;
width: auto;
/* 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-position: 95% 50%;
color: #FCFDFF;
/* 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-position: 95% 50%;
width: auto;
float: none;
color: #392B68;
/* 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-position: 95% 50%;
color: #FCFDFF;
width: auto;
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;

Answer 1

because of the interpretation of the different browsers, it is very difficult to get the correct outcome each time.
In your case, I would do exactly as you have done, that is apply an auto width to the menu item and then apply a padding to fill the rest. I then centre the menubar so that the difference is equally divided betweeen left and right.
Gramps