Dropdown boxes not working with Internet Explorer 8

Hi,



When i am using Internet Explorer 8 and am at checkout, the dropdown boxes for Address, Billing information etc. don’t work. As soon as you click on the arrow to drop down the options, it displays the options for less than a second, and you cannot select any of them.



The dropdown boxes work for other parts of my site, for instance in the product pages, but not at checkout.



I am using version 2.010. Can anyone help please?



Cheers



Mike

Can anyone help please?