I am having a similar issue, and I know what is wrong, but I do not know which page to change the code. When I am in the product results page and the customer clicks on the next page I get the error the page can not be found. It is losing the URL, which I went into firebug and added the url and it works, but I can not find the exact page that I need to change the code on. Please help ASAP as I have a huge sale going on right now today that the customers can not vies the selections. Here is the code that has somehow changed.
I know I just need the url but not sure the page. Please help.