Let's review the facts.
It's not working. It's fixed remotely. Without any change to your device (verified by effected iPads that are not 3g so no network connection)
um.
Why is it reaching out (clearly demonstrated by the 404 error page we were getting) on a fully loaded and installed iOS6 device the first time it connects via wifi? Is it authenticating something? passing data? what IS it doing?
There is no reason a device should phone home silently like that when you turn on the wifi for the first time. The only thing I can think it's something tied to the voluntary feedback option but I am not sure I had it turned on on all of my effected devices.
Your foil hat is too tight