I believe this is more likely a problem with Skype than a problem with gnome-panel as you do not appear to be suffering corruption to any other icons.
** Package changed: gnome-panel (Ubuntu) => skype (Ubuntu) -- You received this bug notification because you are a member of Canonical Partner Developers, which is subscribed to skype in Ubuntu. https://bugs.launchpad.net/bugs/815122 Title: corrupted skype icon on systray To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/skype/+bug/815122/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~canonical-partner-dev Post to : [email protected] Unsubscribe : https://launchpad.net/~canonical-partner-dev More help : https://help.launchpad.net/ListHelp

