links not working

Hi can anyone help ? My website is up I’m using the theme business lite 2.8.2 it’s fine in most browsers but all the links are messed up and no products are there in internet explorer 7 and some linux browsers which is no good when you are trying to sell stuff to customers. Is it because of the theme ? Or the wp commerce plugin ? Here’s the link if anyone wants to look http://www.fabgems.co.uk
Many Thanks.