Temp files not deleted

[mkarliner]

I'm using delayed_paperclip with S3 and resque, and my attachment model looks like this has_attached_file :media_file, styles: { thumb: '160x', small: '320x', medium: ['640x480', auto_orient: false], large: '1024x', default_url: "/logos/:style/footle.png" }, :source_file_options => { :all => '-auto-orient' }, auto_orient: false

All the files that are generated as part of the thumbnail generation are still there after processing is complete.