<A target="_blank" href="http://www.pcworld.com/article/215196/is_the_skype_crash_windows_fault_or_skypes.html?tk=rss_main">The Skype client for Windows version 5.0.0.0152 is being blamed</A> for the recent outage. But, who's to blame for almost half of Skype's users not having upgraded to the newer client?