Don't over-rescue errors, it's bad for you.

lib/paperclip/geometry.rb

@@ -17,7 +17,7 @@ module Paperclip
       file = file.path if file.respond_to? "path"
       geometry = begin
                    Paperclip.run("identify", "-format %wx%h :file", :file => "#{file}[0]")
-                 rescue Cocaine::CommandLineError
+                 rescue Cocaine::ExitStatusError
                    ""
                  end
       parse(geometry) ||