The known Start menu search bug is an interesting one.
On one system, search in Start mostly works, searchapp.exe doesn't crash often, and when it does it restarts and mostly stays running (and working).
On another system, search in Start is never available because searchapp.exe crashes and basically stays that way. Sometimes there is a flurry of crashes in quick succession, but searchapp.exe is never in memory long enough for search in Start to ever work. Fortunately, it's not a case where it's in an endless searchapp.exe crash loop.
It's hard to explain why two systems with the same build experience the bug so very differently, but does anyone else think that the Start menu maybe shouldn't be tied in any way to an app?