Microsoft has just released the latest installment of the Windows Vista pre-RC1 builds, with Vista Build 5472.5 making its way to TAP and Tech Beta tester today, and for once, MSDN Subscribers too.
Build 5472.5 is a standard FRE Staged build, only available in English at the moment, though Arabic, Japanese, and German builds may follow. At this point all the builds we are seeing seem to undergoing severe stages of heavy optimization: although faster code normally comes at the expense of larger files as a rule of thumb, this build of Windows Vista packs a punch performance-wise, but is only a 100 MB larger than its predecessor, Build 5456.
The fact that this build has been distributed to a very large segment of the beta testing population (MSDN and Tech Net subscibers are normally excluded from interim builds like this one) leads us to believe this is the real deal: the build that will be RC1 with a bit more time and some more optimizations. It is probably meant to provide a testing background for the new ‘Aero Express’ theme (see below for more).