IE7 put some extra right margin on super fish menu

I have developed a business website that is based on Drupal. I integrated super fish menu on it however it puts开发者_如何学运维 some extra margin when preview IE6 and IE7. In IE8 and other browsers render it nicely could you please help me fix that issue?

Live website preview

how it appear in IE7 and IE6

http://i51.tinypic.com/mrtydv.jpg

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Just try this,

#superfish .menu li li{ width:150px /*your wish but set fixed width*/}