I had trouble downloading iso's with browsers, so I made a habit of downloading iso's with wget (other dedicated download tools might work as well).To download with wget , rightclick on the link to the iso in the browser and choose "Copy location". In a terminal, go to the directory where you want to download it to. there, type "wget " and click the middle mouse button (wheel) or both buttons if you have a 2 button mouse. This will paste the copied link in your terminal.
Suse probably has md5sums posted for their iso's. You should test the iso before burning to be sure it's correct
All iso's I've downloaded with wget were fine by the way.