Just a follow up, the width attribute is generally already set in the menu.css so since it is already assigned a value by default in the menu.css then the width specification is not needed in the code I first provided, code below works perfect.
<!--[if IE]>
<style type="text/css">
#navWrapper #topNavigation ul#cssmw_home ul.level-1 > li > a {
float:left;
}
</style>
<![endif]-->