Blogs Comment "Submit" button Broken in IE9 (CSS wise)

This line shown below in base.css needs some tweaking when viewed in IE9. The button goes to a white background in Internet Destroyer 9 (oops explorer 9)

#comment-form .sbutton {background: #3C8633; margin: 0px 0px 1em; padding: 0px 6px 3px; font-size: 14px; height: 25px; color:#666; line-height: 25px; width: auto; overflow: visible; border-top: 0px none; border-right: 0px none; border-bottom: 0px none; border-left: 0px none;}

Yes, I changed the color of the text so I could see it till this gets figured out.

WordPress 3.3
BuddyPress 1.5.2
Theme Version 1.2.9

Anyone have any ideas? Is it the new WP3.3 or IE9? How to fix?

Thanks in advance!