macuser:MikeB4:macuser:wasabi2k: to be pedantic, these are not beta releases.
A tech preview is more akin to alpha - as in stuff will be broken, which I assume you know.
They are making massive fundamental changes to how the start menu works, it is going to break.
People wanted access to builds as they became available - they got it.
I like this build a lot, much more polished than the last. Like search in start menu looks nicer, brightness is adjustable now from quick settings. Lots of bugs but design wise better.
Have you encountered the known issues?
Yeap Win32 apps don't launch from Start menu but launch fine from search
They should be OK if pinned to the Task Bar or launched from Run