IE9 just seems to be hit and miss
Even tried the <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE8" />
But still hit and miss some times get invalid token but all other browsers are fine
I can login in and out on virtuemart using IE9 and it shows two items in the cart. View the cart and it is empty.
Select continue shopping and the cart shows two items again.
Add another item to the cart, view cart and it shows the new item added to the cart and the one that was in the mini cart before that would not show when the cart was requested.
How about this one then, delete the items from the cart, go back to shopping and the mini cart shows them still there, click on the mini cart and cart shows the two items that were deleted.