Yeah it was working fine a week ago. then I updated to 4.1 and downgraded back to 4.0. Now the iPod joins the network, but no bars show in the border and there is no Internet access. It works on my friend's iPhone and all of my other friends' iPods, and they all have 4.0/4.1. All other wireless networks work fine, just not the school network anymore. I changed the DNS to OpenDNS and it still doesn't work.