jnicklas/carrierwave — pull request #659 by paladiy (2012-03-18 10:33:05+00:00)
Title: CarrierWave::Storage::Fog::File.size changed 

CarrierWave::Storage::Fog::File.size changed to return zero size when file physically does not exist.

So that I will not get strange error like this:
> undefined method `content_length' for nil:NilClass
> carrierwave-789a8b952764/lib/carrierwave/storage/fog.rb:228:in `size'