FaceTime microphone doesn't work with iMac running Lion
I have Facetime on my intel iMac running Lion. Vision is fine and I can hear the caller - but they cannot hear me. The settings for the microphone sensitivity appear to be changed to lowest sensitivity when Facetime is running - regardless of what they normally are set at, and cannot be adjusted whilst using Facetime. No problem with Skype. Facetime on my macbook works fine - and does not take over the microphone settings. Can anyone advise please?
iMac, Mac OS X (10.7.2)