Hi, I've had this same problem with the pop=0 getting added to the end pf product urls when you move backwards and forwards to the next product from the links in the product page. This code change detailed on this thread has resolved this for me but i still have another issue which is detailed in this thread below and i'm wondering if it is somehow related or can be fixed in a similar way? cat=0 or cat= is appearing in many of the main page urls when some people browse them yet i dont get them appearing myself. These catid= bits are creating duplicate urls which i want to remove as i dont want it impacting with Google search results etc

www.topfurniture.co.uk/oak-dining-table.html ?catid=0

forum.joomla.org/viewtopic.php?f=544&t=401061