As Karl noted in his Patch Tuesday post, yesterday was the last day of support for Windows XP.
We flipped the switch at midnight last night to make detection of XP a failing condition for TrustKeeper vulnerability scans. Those relatively few TrustKeeper scanning customers with XP machines will now see their warnings replaced by findings noting that they're running an unsupported OS.
Bye-bye, XP. Hope not to see you around.