ButterKit/Butter — pull request #41 by joshaber (2013-08-17 02:44:53+00:00)
Title: Gave that project some explicit architectures. Xcode 4 loves explicit architectures.

Poor ol' Xcode 4 doesn't appreciate not being given explicit architectures. I'm not *quite* sure it's fair to drop Xcode 4 support seeing as Xcode 5 is still in DP, but that's totally your call.