thoughtbot/paperclip — pull request #665 by radicaled (2011-12-02 18:52:03+00:00)
Title: Ruby 1.8.7 compatibility for Paperclip::Options property setters

Symbols don't have the `[]` method in 1.8.7.

So you can't do this: `User.avatar.options.processors = [:special_processor_only_for_this_model]`

Patch resolves issue by transforming symbol to string before attempting string slice in `Paperclip::Options#method_missing`.