I am somewhat surprised by this issue, because we terminated our affiliation with IGive on August 10, 2004.
I have contacted IGive to point this out, since we quit working with them over complaints exactly like this one. I am doing what I can to have this redirect removed from IGive's software.
I empathize completely with affiliates who find this sort of behavior unacceptable. The only consolation that I can give is that IGive isn't being compensated for any traffic that they send to our site.