said by StuartMW:
This thread, in Microsoft's MSE forum, might shed some light
The correct version # is 18.104.22.168 and the upgrade is only available via the WU process or from the program's 'check for software updates' feature (which uses the WU pipeline).
BTW the thread also contains a link to the updater EXE so you can update offline if you wish.
Nice find, now I can pull out the installer from my Updates cache
I gotta try and find the same thing when I'm at work for Forefront 2010's update that came out in November, it was WU only so you have to install the original build and then WU update it, I've been hoping for an easy offline way to do that.