Error in page with Chrome but not with Firefox or IE

[eluser]vincej[/eluser]
This one is weird - I get the following error with Chrome 35, but not with IE 11 or Firefox 29:

Fatal error: Call to a member function num_rows() on a non-object in /home/countr70/public_html/application/models/mcustomer.php on line 433

I know what the error means. It means that the query has not found any rows.

It refers to this code:

Code:

function GetCustomerPickupLocation($tel_customerid) {
     $sql ="
  select `location`,`id`,`locationid`
  from locations,customer
  where `locationid` = customer.deliveryid
  and customer.id = $tel_customerid;";
  $Q = $this->db->query($sql);
  if ($Q->num_rows() > 0){                       // line 433
        $row = $Q->row();
     return $row->location;
   }
     }

When I check the $tel_customerid with die() I get a bizaar value:

percent three C ( Sorry this site refuses to allow me to enter it lterally )

which of course causes the query to fail. I do not know what or wher this value comes from. It should be a url segment value.

If it is relevant, I recently upgraded to 2.2. Also I recently added SSL to the site.

My question is why would it give an error in Chrome but not in IE and Firefox.

Mnay thanks !