You can't sneeze at this cart without breaking something. Great features like coupons that calculate at double your intended value, Tax rates that can't distinguish between states, Shippers that simply won't show up in checkout. Login to make adjustments to your configuration and then login again because it loops. Fixed permissions to stop the looping and now the save and apply buttons have vanished. This version should be downgraded to alpha. I'm going back to OsCommerce.