A couple of weeks ago, some Internet rumors claimed that the final version number for the Windows 8 Release to Manufacturing (RTM) build
would be 8500. Now another website, who has offered reliable information on this subject in the past, reports that the current Windows 8 RTM candidate build number from Microsoft has gone beyond 8500.
Winunleaked.info (free registration required) claims that the current build for Windows 8 RTM is 8506.0.winmain_win8rtm.120630-1900. Indeed, the newly updated Windows 8 Builds list shows a number of RTM candidate versions that are above 8500. If this list is indeed accurate, it shows that Microsoft is still continuing to tweak the final shipping version of Windows 8.