thoughtbot/paperclip — pull request #1204 by naan (2013-03-22 00:26:25+00:00)
Title: :url and :path option with Proc doesn't work with S3 storage

If you use lambda function for :url, and/or :path paperclip options with S3 storage, paperclip raises an exception. Fixing this by simply calling lambda function before it gets read.