@joev - the + symbol to the right of each menu item has a border..... in the css sheet, this image has been floated, and made to full width. This hides the link underneath. The link still exists, its just hidden under the floated image
@John - its just the original virtuemart cart module, moved into the module position Top (i think). The mynxx one had to be switched off to get it to work tho.
I enabled the original cart module in the top position as you said, but it behaves differently. When I add multiple items, it lists them out so the module pushes the whole top of the site down. It doesn't behave like yours or the RT cart where it keeps a running total on one line. Did you do any modifications to the original cart module? If you can, can you PM me the cart module you are using so I can take a look at any modifications?