Possible helpful fix
Hello,
One thing that can help is using a Conditional Comment and specify the rule for IE7 only
Place in head tag
<!--[if IE 7]>
<style type="text/css">
ul#cssmw ul.level-1 > li > a {
height: 16px;
</style>
<![endif]-->
This will mean at least all other browsers will render width auto ok. And you only have to worry about IE7