> > What could be causing this: > > http://you.can.put.anything.you.want.to.here.gfviz.com/ > > It's IIS on NT 4. > The only thing I can think of is either an ISAPI filter doing the work or something else in front of the server (lilke a load balancer); the host headers dialogue in the site properties doesn't do pattern matching. Is this a server you have control over? (if you figure it out, let me know, I'd like to look at it =) ) sgd