Unfortunately I am still experiencing this error. I have upgraded to Joomla 2.5.3 and have the latest version of Hikashop. I have the AJAX buttons turned off and have configured the P3P policy according to the link you provided but am still having problems with some users (all using IE) unable to complete their order. They are able to submit their address and shipping information (create user) but are unable to submit their order. My checkout workflow is login_address,coupon_cart,payment_shipping_cart_status_fields_confirm,end. Any help would be greatly appreciated! Thanks!
HIKASHOP ESSENTIAL 60€The basic version. With the main features for a little shop.
HIKAMARKETAdd-on Create a multivendor platform. Enable many vendors on your website.
HIKASERIALAdd-on Sale e-tickets, vouchers, gift certificates, serial numbers and more!
MARKETPLACEPlugins, modules and other kinds of integrations for HikaShop
