My friend has a D-Link DI-524 router that she uses for her home broadband. It's a pretty vanilla setup with the standard firewall settings, DHCP enabled etc.
However, recently she has experienced something strange - cookies are not working on every computer on her LAN, whether using FF3.5 or IE8.
I tried viewing the HTTP traffic using Fiddler2, and the requests come through fine (mind you, Internet browsing still works flawlessly) but whenever a website tries to set a cookie using the "Set-Cookie:" header, my computer sees that line as "Set-*ookie:" with the cookie contents removed.
I have never seen anything like this - do you have any idea?