Ie9 Does Not Show Cart Dropdown

In IE9 the cart dropdown list is not displayed correctly, see attached image. Only the border is displayed but not the content.

Any information is welcome.

cart dropdown empty ie9.png

I can see the drop down in IE9 on my pc but I am on Windows 7 so that may be the difference.

Works fine for me too in IE9 on Windows XP and Windows 7 on the demo store and all my customised sites. From your screenshot, it looks to be most likely a CSS issue.