(MacBookPro7,1) After the upgrade, nobody could hear me in skype and in facetime. I went to system settings for the mic, and the input volume is to to highest, but the input level barely moves. If I tap the laptop chassis it detects it very strongly, but not my voice. I recorded myself in audacity and see that the mic does work but the volume is very low. edit: guess it wasn't software related. I opened up the macbook, pried the mic off the body, blew air in it to clean it, and put it back. Works fine now.