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@@ -65,6 +65,9 @@ module Paperclip
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   class PaperclipError < StandardError #:nodoc:
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   end
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+  class NotIdentifiedByImageMagickError < PaperclipError #:nodoc:
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+  end
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+
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   module ClassMethods
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     # +has_attached_file+ gives the class it is called on an attribute that maps to a file. This
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     # is typically a file stored somewhere on the filesystem and has been uploaded by a user. 

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@@ -189,10 +189,8 @@ module Paperclip
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                                                    dimensions,
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                                                    format, 
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                                                    @whiny_thumnails)
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-        rescue Errno::ENOENT  => e
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-          @errors << "could not be processed because the file does not exist."
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         rescue PaperclipError => e
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-          @errors << e.message
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+          @errors << e.message if @whiny_thumbnails
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         end
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       end
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     end

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@@ -18,7 +18,7 @@ module Paperclip
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     def self.from_file file
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       file = file.path if file.respond_to? "path"
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       parse(`#{Paperclip.path_for_command('identify')} "#{file}"`) ||
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-        raise(Errno::ENOENT, file)
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+        raise NotIdentifiedByImageMagickError, "#{file} is not recognized by the 'identify' command."
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     end
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     # Parses a "WxH" formatted string, where W is the width and H is the height.