Drop-down box has bug in IE,how to solve it?Help

Hi,everybody,
When use the oxid-esales,we found a bug.The Drop-down box in product to choose color or size cannot use in IE8 the following version.when you clike the drop-down box to choose color,it will redirect to the home page of the shop.
I really need a help,because so many people use IE6,IE8.
Thank you for all!!

                                                       Madder

Which Shopversion? I think this Problem exists only in older Versions.

I use the Shopversion 4.5,this version is so old???

Well it is kind of the first version of the new azure theme. Look here: https://bugs.oxid-esales.com/view.php?id=2809

You should upgrade, but you’ll have to redo the template changes you made, because there were some changes in the azure template between 4.5.0 and 4.5.1.