I have a MacBookPro 5.3 equipped with Ubuntu 10.10 on which I have repeatedly tried to use Skype but the result is disappointing: (a) while I can hear and talk (only when enabling PulseAudio), the quality of the sound is very very poor; (b) each call to a phone number is duplicated; (c) I have to manually kill Skype to exit the program.
In the past six months, I have tried various solutions found on the forums but with no satisfactory outcome.