We just upgraded our cable modem/router and the new router uses WPA2 security with a twenty digit security code. All my household items are transferred over and I've had numerous guests visit and get on the network without issue. There are no MAC blocking or other router based screens in place. Both my wife and my previous MS had no issue with our home network. I was hoping to get the latest firmware so I tried getting my P85D on the network on to have it fail. I then tried my wife's car with the same result. The car recognizes the network is WPA2 but will not log on. Has anyone been using a WPA2 security based wireless router with success?