I know your code is ok, but since you know very well what are it's effects, you are in a good position to see faster then anyone where is the issue, since if i just take it out from application_top php it is ok...find this strange, since the only code to change to default shopping_cart.php i have is the code produced by
AJAX shopping_cart contrib by delete - which has online demo working flawless
And minimum order contrib
... Anyway mirko0007 advised me to just:
i don't won't to mess with HTTP_SERVER_VARS and PHP__SELF since they are not secure, so i just comment out the error line die( '</td></tr></table></td></tr></table><br><br><font color="#ff0000"><b>Error!</b></font><br><br><b>Unable to determine the page link!<br><br>' );
I know this is only indirectly related to USU5, but can you check this... thanks in advance