I have a clean install of windows 8 professional 64-bit and have just installed start8. There''s a bug with start8's search functionality, if you backspace too quickly (by holding down backspace), the start menu gets stuck on a glitched search page instead of going back to the main start menu (where it shows recent apps/all programs/search box). The issue does not happen if I backspace the search slowly, but is 100 reproducible if I hold backspace.
Screenshot of the bug: 
