World's top benchmarking site bans Windows 8. Blames unreliable RTC clock.
"In an odd turn of events, Windows 8 has been banned from HWBot, one of the world’s top benchmarking and overclocking communities. All existing benchmarks recorded by Windows 8 have been disqualified. This is due to a fault in Windows 8′s real-time clock (RTC), which all benchmarking tools use as a baseline.
Windows 8′s RTC isn’t reliable. According to HWBot, Microsoft made some changes to Windows 8′s timekeeping routines to allow for low-cost devices and embedded systems that don’t always have a conventional PC-compatible RTC.
"benchmarks performed under Windows 8 will no longer be accepted"
Windows8 Time Machine (via Massman89)