Between August 08 2008 18:00GMT and August 09 2008 03:00GMT, GrabPERF had a network-related outage at the hosting facility.
Many thanks to the Technorati team for working hard to resolve this complex issue, which eventually turned out to be a loose fiber-cable.
Data from the time period has been cut, so no one’s stats should be affected.
I apologize for the incovenience.