Thank you for pointing this out, these ones slipped by me. The banners have been stopped and the client has been contacted.

No problems with your ISP, this was my bad. The correct link was in fact http://www.codeproject.com/redir.aspx?adid=11511. The HTML version of the survey email contained both a link to the survey and a link to CP. Just to be cheeky I decided to track the CP link on the HTML email. On the TEXT version of the email, I did not track the CP link as it would have looked weird. But like an idjut, I pasted the CP tracker instead of the survey tracker. I blame the flu... Mike Code Project - AdOps

Thank you for bringing this to our attention. The offending banner has been disposed of. All involved have been made aware of the error.