I downloaded the new 4.2.1 yesterday and at first didn't notice anything out of the oridinary. This morning when I went to tether my phone to my MacBook Pro, the tethering part would not work. I have gone into the settings on the phone and made sure that tethering was in fact turned on and it is. I do not see the typical 'blue' banner at the top when I am plugged in and my MacBook does not recognize my phone as a network connection anymore. Does anyone else have this same issue? How about the screen lock only allowing you to lock in portrait? Thanks in advacne for the help.