thoughtbot/paperclip — pull request #771 by awd-switzerland (2012-03-05 11:32:04+00:00)
Title: content_type for different styles

Hi there
I've made a patch, I've added a parameter to Attachment#content_type to enable asking for the content_type of different styles.
Example:

def show
send_file @user.avatar.path(:thumb), :type => @user.avatar.content_type(:thumb)
end