jnicklas/carrierwave — pull request #643 by Houdini (2012-03-04 00:05:54+00:00)
Title: Some fixes when update nothing

Hello, I really have no time to investigate carrierwave's code, I just create really simple test and fix it.
Also fix

NoMethodError (undefined method `remove_previously_stored_files_after_update' for nil:NilClass):

It's works for me now.