Screenshots of a Windows 7 post RTM build have shown up on the web this week fueling speculation that Microsoft is compiling early Windows 8 builds.
Russian site, Wzor, leaked a series of screenshots from build 7700.winmain.100122-1900. Although nothing appears to have changed visually, the jump from 7600 (Windows 7 RTM build) to 7700 may suggest some kind of early milestone towards the Windows 8 alpha and beta stage. Microsoft has slowly been compiling post RTM builds of Windows 7 since its July RTM in 2009.
Wzor also published a list of builds that have been compiled after the final Windows 7 RTM. Judging by the list, the software giant has been hard at work compiling builds throughout September 2009 to January 2010:
It does not appear that these builds are service pack builds for Windows 7 SP1 as Wzor has confirmed those began from 7601.winmain_sp. Last week an ex-Microsoft worker penned July 2011 as the RTM date for Windows 8.