Hello man,
This image:
http://i.entier.ecosm.com/img/?wrrbwqeq
As you can see it's not only an image - that's a script that prints an image at the end of it's execution. The point is - the script that's running there is trying to create a Cookie on the surfer's PC. In case that the site is not able to create the cookie for some reason it may end in endless loop - creating another and another cookie, which is not identified that is there. My point is - use some other banner or contact your sponsor. These guys that are trying to submit should probably:
1. Update to the latest version of IE
2. Accept cookies, decrease the protection level of the browser and change other similiar settings in their browsers
3. Switch to Firefox
