After upgrading to 0.8.2.637 I can no longer play local files, I can't share to facebook, twitter and so on, and there's no automatic posting to facebook. It also sometimes stops playing after a song even spotify is set on random play.
I too was unable to accept the license due to the buttons disappearing. So i set the spotify login window to "always on top" and then logged in. As usual i got the spotify window plus the license window without buttons. I tried to access my playlists, and this time the text in the license window changed and the buttons appeared. Seems to work fine now.