i have this in my template file for the product browse flupage.tpl.php (if you use this)
}
$previous_product_url=str_replace ('?pop=0', '', $previous_product_url);
$next_product_url=str_replace ('?pop=0', '', $next_product_url);
if( $this->get_cfg( 'product_navigation', 1 )) {
and its works. i only added this to it.
$previous_product_url=str_replace ('?pop=0', '', $previous_product_url);
$next_product_url=str_replace ('?pop=0', '', $next_product_url);
the rest was in there.