My guess is that this is related to the Webkit component Skype 5 on Mac is using for the IM window. So Skype 2/Mac should be safe, as are all other OSes. Also,

My guess is that this is related to the Webkit component Skype 5 on Mac is using for the IM window. So Skype 2/Mac should be safe, as are all other OSes. Also, it's obviously not "root" unless there's a separate privilege escalation bug in OS X.