[ubuntu] Skype 4.2 installs but doesn't run on 13.04

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http://ubuntuforums.org – I was running Skype and it worked OK up until an Ubuntu update around the middle of May 2013. I've not been able to get Skype 4.1 or 4.2 to run after installation. I have attempted to do an installation from the software center and also the Skype web site with the same results. The Skype icon appears in the software search bar but when I click on it, nothing happens. I did the "sudo dpkg --add -architecuture i386" then the "sudo apt-get update" and reinstalled Skype with the same results of Skype won't run. I've uninstalled and reinstalled Skype and rebooted. MSI lapt (Hardware)