I have had skype in the past, went to use it today and it had mysteriously disappeared off of the system. Nevertheless, I went and downloaded and reinstalled the program again. Only, when I try to open the application I get a "Skype has quit unexpectedly" message - every time. My running system is up to date (Mac OS X 10.6.8 ). I have removed and reinstalled. I have gone through the trouble shooting steps - deleting various files from application support etc. But all to no avail.