Prestashop needs to add some basic payment and shipping modules + a laundry list of other critical features before anyone will take this cart seriously
I hate to vent, but I still can't believe Prestashop hasn't included a core Fedex, UPS, or USPS Module... I realize the project is EU based, but it's never going to be taken seriously if it doesn't integrate what other carts already offer out of the box...
This will fix the state not displaying error in IE. Change:
/* id_state field in managed via JS and is firstly hidden */
form p.id_state { display:none }
To
/* id_state field in managed via JS and is firstly hidden */
form p.id_state { }