I would like to also share my Network Error problems. It has happened to me several times, the only way to fix was to reboot. I noticed it is happening when going from one internet connection to another. I leave my house to go to my brothers, connect to his wifi and it immediately gives the network error.
I have also experienced this at school as it requires us to go to a login website once connected to their wifi. The google voice times out and then network errors on each reconnect attempt.