I have a shopping site I go to all the time. I can go to order history, click on an order and then on an item within the order. It will take me to the product page. Just recently, when I do that in Firefox it will not take me to the product page. It says the item can not be found. I opened IE8 and went to the site and everything works so this is happening only in Firefox.

Seems like I've been having lots of problems recently with Firefox. I've already had to disable Site Advisor because when I had it on I couldn't use my back arrow.