4.2 Beta 3 stock( non jailbroken) ipad: I currently use (on 3.2.2) a USB microphone ( blue Yeti or Samson GTrack). When I loaded the 4.2 iOS version neither one of them appear to work with this new iOS version. I have connected them and they appear to power however they do not work as audio input or output devices. Has anyone here tested the USB with these? Did Apple change the audio drivers accessible from USB? Does anyone have a work around?