I didn't notice until this morning when I started to fill out the rebate for these that OM had sent me 24x disks in my Internet order. The rebate specifically states that it is for the 32x disks. Also, the rebate stipulates that the "Rebate Receipt" be included in the rebate submission. I didn't get one from my Internet order (probably no one did who ordered via the web).
So, I went to OM, showed them the invoice and the 24x disks, and the rebate stating that I needed the Rebate Receipt. They took back the 24xs, credited my account, and sold me the 32xs which generated the Rebate Receipt.
Tomorrow is the last day you can buy these and still do the rebate, so if you also received 24xs, or don't have the Rebate Receipt, you can still fix it by going to your local OM.