There is a bad link to our site out on the web somewhere where we have no control. It's in the form of www.ourdomain.com/t-topicname.aspx,, where the two commas are part of the link.

We have the ProductNotFound topic set up to fire on a 404 page not found and it's working fine. However, on this bad link, it's not working. We are not catching the page not found and the user gets a generic 404 page in the browser. They are thrown out of our site and Google is reporting a 404 error on our site.

Since we have no control over the bad link, is there a way to catch a bad link of this format?

Thanks