-version 1.2.3-

Passing quoted dimension values results in a MiniMagickError due to double-quoting:

******
>> path = "#{RAILS_ROOT}/public/images/ad_120x90.png"
>> image = MiniMagick::Image.new("#{path}")
>> w, h = image['%w %h'].split
identify: unable to open image `%h': No such file or directory.
MiniMagick::MiniMagickError: ImageMagick command (identify -format ""%w %h""
"/Users/aaron/mysite/public/images/ad_120x90.png") failed: Error Given 256
        from /Users/aaron/mysite/vendor/plugins/mini_magick-1.2.3/lib/mini_magick.rb:124:in `run_command'
        from /Users/aaron/mysite/vendor/plugins/mini_magick-1.2.3/lib/mini_magick.rb:66:in `[]'
        from (irb):3
>>
*******

Changing mini_magick.rb line 117 from

arg = %|"#{arg}"| unless arg[0] == ?-

to

arg = %|"#{arg}"| unless arg[0] == ?- or arg.scan(/\"(.*)\"/).length > 0

solves the problem.

-Aaron