I’ll just list the questions:
Will the version I got from Humble Bundle be automatically updated or do I need to re-download it when an update lands?
Is the Humble Bundle version ‘Stable’ or a latest dev build?
Where do I go to find out what Steam version I have? I see a lot of talk about 'dev build 2176x64, but I have no idea where you get this information. All I see is "Current contend BuildID: 521576