I have PM'ed you back, I have not found issues with using IE10 on your site.
As for the very long list of Categories in the Refine Search sidebar, I have posted months ago on this issue but...
I have PM'ed you back, I have not found issues with using IE10 on your site.
As for the very long list of Categories in the Refine Search sidebar, I have posted months ago on this issue but...
Just searched your site and didnt found anything.
You can use this code
#main-navigation .menu li:hover .adv_categories {
display: none;
}
for disabling the drop-down.