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I've noticed some things I haven't seen on the site.
For instance, previously on collab piqs it says "invite friends to collab" bar on facebook (meaning there are now 2 facebook buttons on collab piqs).
2 reasons I beleive this is a new feature:
-Dan stated new features added wont be noticable that much, AND they will be small at first.
-The contest is for bases, so perhaps that was the theme of the update. I know for certain they fixed the glitch when the base goes black when you try to collab on it.